Words Extracted From The
Mammoth Uncensored Word List (344,306 Words)

Mammoth Uncensored Word List (344,306 Words)

9 letter words ending in r in the mammoth uncensored word list.

This is a list of all words that end with the letter r and are 9 letters long contained within the uncensored mammoth word list. This is an uncensored word list, and it has some really nasty words. If this offends you, use instead. If you need more resolution than 2 letters, try our live dictionary words ending with search tool, operating on the uncensored mammoth word list.

2,581 Words

(0.749624 % of all words in this word list.)

abandoner abdicator aberrator abnegator abolisher abrogator absconder absoluter abstainer abstruser acapsular accipiter acclaimer accounter accusator acellular acetifier acidifier acoumeter acquitter acrometer activator activiser activizer acyclovir addresser addressor adjutator admonitor adulterer advocator advoutrer aerometer aeromotor aeronomer affiancer afflicter affronter aggressor airletter airmailer airmarker airometer alabaster alexander algometer alienator alkaliser alkalizer alliancer alligator allocator almsgiver altimeter altometer ambipolar ambulator amplifier amputator ancienter animalier annotator announcer antechoir antiarmor antibuser antichlor antilabor antilifer antimeter antinuker antipolar antiradar antisolar antitumor antiulcer apatosaur aphorizer apparitor appetiser appetizer applauder appointer appointor appraiser aquameter arblaster archaiser archaizer archosaur areometer arraigner arrogator articular artificer ascendeur asmoulder aspersoir asphalter aspirator assaulter assembler astringer atmometer atrabilar attainder attempter attolaser attoliter attometer attracter attractor augmenter augmentor auricular auslander automaker autometer autotimer auxofluor auxometer avascular avouterer avuncular awkwarder axehammer azobacter backbiter backorder backspeer backspeir backstair backwater badmanner bairnlier balladeer ballaster ballooner balthasar balthazar bandelier bandoleer bandolier bannister banqueter barbecuer barbequer bargainer bargainor bargander baritenor barkeeper barmaster barometer barracker barretter barrister bartender baseliner batfowler bathchair bathwater beachgoer beachwear beancaper beastlier bedrester bedsister bedsitter bedwarmer bedwetter beefeater beekeeper beermaker beglamour begrudger behaviour beleaguer belittler bellmaker beltmaker bemonster benefiter benighter beplaster bergander berserker bescatter beseecher beslobber beslubber besmearer bespatter betokener bewhisker bewitcher bicluster bilaminar billowier bilobular bilocular binocular binovular binuclear biofilter biofouler bioimager biomarker biosensor bioterror biotester bitplayer blabberer blackener blarneyer blastopor blastular blatherer blemisher blesseder bletherer blightier blitherer blockader blotchier bloviator blowdrier blubberer blueliner blunderer blusterer boatowner bogometer bolometer bolsterer boltmaker bombarder bombaster bombmaker booklover bookmaker bootmaker botaniser botanizer boulderer bowhunter bowlmaker boxcutter boxholder boxkeeper boycotter bramblier branchier breakover breathier brigadier bristlier broadener broiderer buccaneer buccanier bucentaur bucinator budgeteer buirdlier bullbrier bulldozer bumrusher bumsucker burnisher busheller butcherer butterbur butterier bystander cabdriver cakemaker calembour calendrer calfdozer caliatour calicular caloriser calorizer calycular camcorder camelhair campeador canceleer cancelier canceller canicular cannister cannoneer cannonier canoniser canonizer canoodler canvasser canyoneer capacitor capitular caponiser caponizer carabiner caracoler caravaner carbineer carbinier cardmaker caregiver caretaker carhopper carjacker carnosaur carpenter carpooler carrefour carrotier carryover cartmaker cartopper casemaker cashierer castrater castrator cataloger catalyser catalyzer catcaller catnapper cauchemar cautioner ceftiofur centenier centraler centumvir certainer certifier chafferer chamberer chamferer channeler character charterer chastener chastiser chastizer chatterer chauffeur chavender cheapener cherisher chevalier childlier childrear chinchier chintzier chipmaker chiropter chirruper chiseller chorister chowkidar churchier chyometer cinerator cisgender civiliser civilizer clamberer clamourer clarifier clatterer clausular cleanlier clerklier clipshear cliqueier clitellar clitterer clobberer clogmaker clusterer clutterer coadjutor coalescer coalminer coatmaker cocklebur cocreator cocurator codfisher cofounder cogitator cohabiter cohabitor coheritor coinmaker coinsurer colcothar coleopter colickier collapsar collector collinear coloniser colonizer coloriser colorizer comanager combmaker combuster combustor comforter commander commencer commender commenter commentor commissar committer comonomer compacter compactor compander compandor compeller completer complexer composter compotier comprador concealer conceiver concenter conciliar concluder concocter concoctor condemner condemnor condenser conductor conemaker conferrer confessor confirmer confirmor confiseur confiteor conformer congealer conjoiner connecter connector conquerer conqueror consenter conserver consigner consignor consorter conspirer construer consulter consultor contactor container contemner contemnor contemper contender contester continuer contriver convector converser converter convertor convincer copartner copolymer copytaker cordmaker coreigner coremaker coriander corkborer corkmaker cornborer cornflour correcter corrector corrupter corruptor corsetier cosponsor costumier coticular councilor counselor courtlier couturier cowfeeder cowherder crabeater cracklier creeshier cremaster cribellar cricketer crinklier crocheter crookeder crosshair crossover crucifier crumblier crumplier crunchier cryometer cubicular cudgeller cuisinier cullender cunctator cunninger cupbearer cupflower cupholder curiouser curlpaper curtailer custodier cuticular cymbaleer cytometer dancewear dasymeter dayflower daytrader dayworker deaerator dealmaker deathlier debaucher debriefer decaliter decameter deciliter decimator decimeter deckchair declaimer declutter decoherer decorator decoupler dedicator deepfrier deepwater defaulter defecator deflector defragger defrauder defrizzer defroster degausser degreaser deinosaur deioniser deionizer dekaliter dekameter delegator delighter delimiter deliverer demeanour dendrimer denouncer densifier depanneur depilator depositor depressor depurator derringer descanter descender describer desolater desolator despairer despoiler destemper destroyer desulphur dethroner detonator detractor detrender detubator developer dewaterer dialoguer dieharder diesinker digitiser digitizer digresser dilatator disagreer disanchor disappear disavower disburser discanter discarder discerner discloser discolour discreter discumber discusser disfavour disgorger disgracer disgrader disguiser dishmaker dishonour dishorner dishumour dishwater disjoiner dislodger dismaller dismember dismisser disobeyer dispauper dispeller dispender dispenser disperser displacer displayer disprover disrepair disrupter disruptor dissector disseisor disseizor dissenter disshiver dissolver dissuader dissunder distemper distender distiller distorter disturber disuniter ditherier dittander divinator divinizer dodderier dodecamer dognapper dogrobber dogsitter dollmaker dominator donnicker doomsayer doormaker dosemeter dosimeter dotcommer doughtier dowitcher downcomer downriver downstair draughter dribblier dricksier driveller drizzlier droichier drouthier drugmaker drysalter dryworker dungeoner durometer dustcover dynameter dynamiter dynamotor earbasher earmarker eartagger earthlier earthstar easterner edgemaker eggbeater eicosamer eidetiker eirmonger elastomer embezzler embraceor embracerr embroider embroiler emendator emplaster empowerer emulgator enameller enchanter encircler encounter endeavour energiser energizer enervator enfeebler engrafter engrainer engrosser enjoinder enkindler enlivener ensampler enshelter entangler entrainer entrapper entreater enveloper epicenter epistoler epistylar epitapher equaliser equalizer equimolar ergataner ergometer eriometer escalader escalator escheator estimator estivator estranger etheriser etherizer eulogiser eulogizer evacuator evaluator evilsayer excavator excelsior excerpter excerptor exchanger exchequer exclaimer execrator exequatur exerciser exhauster exhibiter exhibitor exorciser exorcizer expediter expeditor explainer exploiter expositor expounder expresser expressor extractor extubator eyeleteer eyeopener eyepopper eyewinker fabulator fadometer falsifier fanflower faradiser faradizer fasciolar fashioner federator feedwater feldschar feldscher feliciter feltmaker fermenter fermentor ferventer fetisheer fiberiser fiberizer fibrillar fidgetier fifteener fiftyfour fillester fillister filmmaker finaliser finalizer financier finetuner finickier fireeater firemaker firepower firewater firstever fisheater flaccider flagellar flagmaker flashover flatliner flattener flatterer flaughter flauntier flavourer fleshlier flextimer flightier floccular floscular flouncier flowerier flowmeter fluidiser fluidizer fluorspar flutterer fluxmeter flyfisher flyrodder focaliser focalizer focimeter focometer foodmaker foolisher forbearer forbidder foreboder foreigner forelayer forestair foreswear forfaiter forfeiter forgather forgetter forlorner formaller formatter forrarder fortifier fortyfour forwander forwarder fossicker foughtier foxhunter fracturer fraicheur fratchier fraudster fraughter frecklier freebaser freighter freshener fripperer fritterer frivoller frizzlier frolicker frontager froughier frowstier fruiterer fulfiller fulltimer fumigator funicular furbearer furbisher furnisher furtherer gadgeteer gagwriter gainsayer gallanter galumpher gannister garnisher garreteer garrotter gasburner gasholder gasometer gastrular gasworker gauleiter gazetteer generater generator genicular genteeler geocacher geomancer germander ghastlier ghostlier giantlier gigaliter gigameter gingerier girlpower glabellar gladdener gladiator gladiolar gladsomer glandular glasswear glissader glitchier glorifier glossator gluemaker gnateater godfather godmother goldminer gondolier goosander gospeller gossipper gradelier graduator gratifier grauncher graywater grenadier grewsomer greywater gristlier grizzlier grossular grouchier groveller growthier gruesomer grumblier grummeter guarantor guerdoner gumsucker gunpowder gunrunner gyrometer hadrosaur hagbuteer hagbutter hairdrier hairdryer hamburger hamfatter handlebar handsewer handsomer haranguer harbinger harbourer hardcover hardliner harnesser harpooner harvester haughtier hayburner haygrower haymonger headchair headliner headpaper headwater healthier hearkener heartener hebraiser hebraizer heelmaker heliskier hemometer hereafter hereunder herringer hesitater hesitator heteromer hexameter highchair highflier highflyer highorder highpower highwater hiphugger hobjobber hobnobber hodometer holidayer holometer homebuyer homecomer homemaker homeowner homodimer homopolar hookmaker hoopmaker hoppercar horologer horometer horsehair hosteller hotdogger housewear howsoever humaniser humanizer humbucker humbugger humdinger hummeller hundreder hundredor husbander hygristor iceboater iceskater idealiser idealizer illtemper illuminer immaturer immolator immuniser immunizer impeacher imperator implanter impleader impoliter impounder impowerer impresser imprinter inaugurer inbounder inbreeder increaser incubator indagator indicator indinavir indweller infielder infighter inflector inflicter inflictor infractor infringer ingrafter inhabiter inhabitor inhalator inheritor inhibiter inhibitor initialer initiator inkholder innerwear innkeeper innovator inreacher inscriber inshelter inspector installer instanter instiller insulator inswinger intimater intonator intriguer intubator inundator inveigher inveigler invocator irregular irrigator irritator isallobar jaculator jaghirdar jargoneer jayhawker jaywalker jeoparder jerkwater jitterier jobholder jobhunter jobseeker joculator journeyer joyfuller joypopper judicator junketeer junketter justiciar justifier karabiner keycutter keyholder keylogger kibbitzer kickboxer kidnapper kieselgur kiloliter kilometer kiltmaker kingmaker kitchener kiteflier kitemaker kitschier klondiker klondyker knaurlier knaurrier knobblier knowinger knubblier knucklier konimeter kryometer kvetchier lacemaker laconizer lacquerer laminator lampmaker lampooner lanceolar landloper landowner latecomer latherier laticifer latiniser latinizer launderer lawfuller lawmonger lawnmower leadmaker leafleter leafminer leaguerer leatherer legaliser legalizer legwarmer lengthier lensmaker levigator levitator liberator lifesaver lightener lightlier lightyear limewater linesider linotyper lipreader liquefier liquifier literator litigator loathlier lobsterer localiser localizer lockmaker locomotor logroller longtimer lossmaker lovemaker lowlander lubrifier lunisolar lysimeter macerater macerator machmeter mafficker maggotier magnifier mailorder mainliner malaxator malfeasor mallander mallender malleolar manhunter manipular mankiller manoeuver manometer manslayer marceller marketeer marshaler massacrer maunderer maximiser maximizer mayflower meanderer meateater medicator mediciner meditator megaliter megameter megapower mekometer melodiser melodizer meltwater memoriser memoriter memorizer memristor mentioner menuisier merganser messenger metrifier microburr midlumbar midsummer midwinter millowner milometer minelayer mineowner minibiker minimiser minimizer minitower mintmaker misaunter miscaller miscolour misdealer miserlier misfeasor misguider mishanter misjudger misleader misnumber mispriser misprizer misquoter misrender misrhymer misshaper missileer missioner misstater mistemper mitigator mixmaster mobiliser mobilizer moblogger modaliser modalizer moderator modulator moistener molecular moleminer mollifier monocular monoester monolater monolayer monometer monopolar monoskier monovular monsignor moonraker moraliser moralizer mortgager mortgagor mortifier motivator mouseover moviegoer muckender muckraker mudlogger mudsucker muffineer multigear multitier multiuser multiyear mundifier murtherer musketeer mutilator mystifier mythifier mythmaker nailbiter nailmaker nanofiber nanolaser nanoliter nanometer nanomotor naughtier navicular navigator nebbisher nebuliser nebulizer neglecter neglector neighbour netballer netkeeper netminder netserver networker newsmaker newspaper nicknamer nightgear nightwear nitpicker nitrifier noduliser nodulizer nominator nonabuser nonanswer nonauthor nonbutter noncareer nonconcur nondancer nondealer nondebtor nondieter nondoctor nondollar nondriver nonearner noneditor nonfactor nonfarmer nonfather nonfeasor nonfeeder nonfilter nonfoliar nongender nongolfer nonhunter nonjogger nonjoiner nonkiller nonkosher nonlawyer nonletter nonlinear nonmatter nonmember nonmerger nonmother nonmurder nonocular nonplanar nonplayer nonraster nonreader nonrioter nonrubber nonsigner nonskater nonsmoker nontalker nontrader nonvector nonviewer nonvulvar nonwaiver nonworker nonwriter norseller notariser notarizer notepaper notetaker nourisher noveliser novelizer nowhither nucleator nucleolar nuisancer nullifier numerator nunataker nutbutter nutjobber nutpecker obligator obturator octameter octopolar oddnumber oddsmaker oedometer oenometer offloader offsetter oncometer opacifier operagoer opercular oppressor opsoniser opsonizer optimiser optimizer optometer opuscular orbicular organiser organizer orienteer orthopter osculator osmometer ossicular outbacker outbarter outbidder outerwear outfilter outfitter outhauler outhumour outkeeper outlabour outlander outlinear outmaster outnumber outplacer outporter outpourer outputter outrigger outrooper outrunner outsavour outskater outstater outworker overactor overclear overcolor overcomer overcover overeager overeater overfavor overhonor overlabor overlayer overlover overpower overrider overruler oversteer overswear overtaker overtimer overtower overwater oviraptor oxywelder pacemaker packmaker paganiser paganizer palaverer palliator palmister panickier papaliser papalizer paradoxer paralyser paralyzer parameter partygoer pasquiler passenger patienter patissier patroller paughtier paunchier paymaster peasouper peculator pedicular pedometer penciller pendicler penholder penmaster penpusher pensioner penworker pepperier perceiver percussor perfecter perfector perfervor performer perfumier perimeter peripolar permeator permitter perorator perplexer persister persuader perturber perverser perverter petaliter petameter petnapper petrichor petrifier petroleur pewholder phalanger phansigar philander philterer phlegmier phonmeter pickeerer picnicker picoliter picometer piepowder pilgrimer pillmaker pilomotor pinhooker pinsetter pipelayer pistoleer pistolier placarder planisher plasterer playactor playmaker pleasurer plenisher plouterer plowmaker plunderer pneometer podcaster poetaster polariser polarizer polltaker poloniser polonizer poloxamer polyester polyether polywater pompadour pontoneer pontonier pontooner porrenger porringer portioner portrayer positiver possessor possibler posterior postiller postponer postrider potboiler potholder pothunter potometer pottingar pottinger potwaller poulterer powderier practicer practiser prankster preachier precancer precensor precentor preceptor precolour precooker precooler precurrer precursor predialer predicter predictor predinner predriver preemptor preferrer prefiller prefilter preflavor preheater prehensor prejudger prelector preloader premerger prenumber preocular prepender prepostor prerender presbyter preseller presenter preserver pretaster pretender pretester prevailer preventer previewer pricklier privateer proceeder processer processor procureur productor professor profferer profiteer prognoser programer projector prolonger promissor propeller propellor propretor propulsor prorector prosateur prosector protecter protector protester protestor protostar provender proworker pterosaur publisher puckerier pulpiteer pulvillar pumpmaker punctator puncturer puppeteer purchaser purloiner pushchair putrefier pyrolater pyrolyser pyrolyzer pyrometer quaeritur qualifier quantiser quantizer quarender quarreler quarterer quartzier quaverier queachier queechier queenlier quickener quicklier quietener quirister quiverier racketeer racketier raconteur radicular raggedier ragpicker rainmaker rainwater ransacker ratemeter ratepayer raunchier reapplier reassurer rebirther reblister rebolster rebooster rebounder rebuilder recaulker receiptor recharger recharter reclaimer recleaner recloaker recluster reconquer recontour recounter recoverer recoveror recreator recruiter rectifier redbaiter redefiner redeliver redivider redoubler redresser redressor reenactor reflecter reflector refounder refractor refrainer refresher regisseur registrar regreaser regressor regretter regrinder regulator reguliser regulizer rehandler rehearser reigniter reinsurer rejoinder relabeler relacquer relaunder relighter relocator remainder remodeler remontoir renouncer renovater renovator rentaller repainter repartner replanter replaster repleader repledger replotter replunder repositor represser repressor repriever reprinter requester requestor resampler rescatter rescinder resembler reservoir reshelver reshipper resoluter resonator respecter responder responser responsor ressaldar restarter rethinker reticular retinular retoucher retractor retreater retriever retrigger retrimmer revelator rheometer rhymester ricketier ridiculer rigsdaler ringmaker ringsider ritonavir roadmaker robemaker rocketeer rockwater rodfisher roisterer romaniser romanizer ropelayer ropemaker rosewater rostellar rotameter rotavator rotovator roughener rouletter routineer roysterer rubberier ruminator rumrunner russifier sackmaker safemaker safflower sailmaker saintlier salimeter salinator salivator salometer saltpeter saltwater sandpaper sandpiper sanitiser sanitizer sapsucker satiriser satirizer satisfier saturater saturator saunterer savourier sawsetter sawtimber scalloper scamperer scarifier scatterer scavenger schedular scheduler schizzier schlepper schlocker schmooser schmoozer schmutter schnapper schnauzer schnorrer scissorer sclaunder scorifier scrabbler scraggier scrambler scrannier scrappier scratcher scrawlier scrawnier screakier screecher scribbler scrimpier scrivener scroggier scrollbar scrounger scrubbier scruffier scrummier scruntier scrutator scuddaler scurriour scutellar seabather seajacker seasicker seedeater segmenter semainier semilobar semilunar semipolar sensibler sentencer separator september septemvir sepulcher sequencer sequester seraskier serenader sermoneer shadowier shallower shamateur shamblier shampooer shapelier shapewear sharpener shatterer sheathier shebeener shelterer shillaber shinglier shipowner shiverier shlockier shoemaker shogglier shooglier shopfloor shortener shorthair shotfirer shotmaker shoveller showerier shreddier shriekier shrillier shrimpier shroudier shrubbier shtickier shunpiker sibilator sidechair sidelever sideliner sidewiper sightlier sightseer signaller signifier silicular silverier simulator sixfooter sixteener sixtyfour skelterer sketchier skiameter skiblader skibobber skijumper skincolor skindiver skyjacker skylarker skysurfer skywalker skywriter slabberer slackener slanderer slangular slaughter sleechier sleepover sleepwear slenderer slickener slickster slimpsier slipcover slitherer slobberer slockster sloganeer slopmaker slouchier sloughier slumberer slutchier smatterer smotherer smutchier snatchier snickerer snifflier sniggerer snitchier sniveller snorkeler snowcover snowmaker snowshoer snufflier soapmaker sockmaker sodawater sodbuster softcover sojourner solicitor sollicker sommelier sonicator sonneteer sonometer sophister sottisier souteneur spanglier sparklier specialer specifier spectator speedster spelunker spherular sphincter spiderier spillover spindlier spindrier spinnaker spiraster spirillar splashier splatcher spleenier splendour splodgier splurgier spoliator sprawlier spriggier springier sprinkler spurmaker sputterer spymaster squabbier squabbler squalider squallier squashier squattier squawkier squeakier squeezier squelcher squidgier squiffier squiggler squinnier squintier squirmier squishier staggerer stammerer stampeder standover stannator starchier stargazer starmaker statelier stationer stauncher staymaker stegosaur stellular stenchier stenciler stiffener stomacher straddler straggler strangler strappier streakier streamier streetcar streetier stretcher strickler stringier strobilar stroppier struggler stubblier stumblier stupefier stupifier stutterer stylisher subcantor subcellar subcenter subchaser subdealer subeditor subfactor subflavor sublessor subletter sublinear submitter subocular subphylar subsector subsister subsoiler subsorter substylar subventor subverter subwoofer subworker subwriter succeeder succentor successor succourer succumber suggester suggestor summerier summiteer sunbather sundowner sunflower sunseeker supersaur superstar superuser supinator supporter supressor surfeiter surfrider surmaster surpasser surpriser surrender susceptor suspecter suspender suspenser suspensor sustainer swaggerer swallower swarthier sweetener sweltrier swiftlier switchier tabasheer tabulator tackifier tahsildar tailender tailgater tailwater tambourer tankmaker tapdancer tapemaker targeteer tarnisher tasimeter tasseller taxameter taximeter taxonomer teaseller teataster teazeller teentsier telemeter teleosaur teletyper televiser televisor tensioner tentmaker teraliter terameter terribler terrifier tessellar testifier thatchier thegither theologer theoriser theorizer thermidor thickener thioester thioether thirstier thistlier threadier thriftier thrillier throatier throttler throwster thrummier thunderer thyristor tidewater tidivator tightener tilemaker tiltmeter tiltrotor timesaver timetaker tinplater tinselier tinworker tiremaker titivator toadeater toeragger tokenizer tolerator tolltaker tonometer tonsillar toolmaker topfiller tormenter tormentor torpedoer totaliser totalizer toughener tourneyer tractator tramliner trammeler trapanner trapmaker traveller traverser treachour treaclier treasurer treatiser treemaker tregetour tremblier trepanner trephiner tricklier tricksier trickster tricolour tricycler trilinear trimester trinketer triplexer trisector triumpher trivalvar trochlear troweller trumpeter tubemaker tubicolar tubulator tunemaker tunneller turmoiler tutworker twaddlier tweenager twiddlier twinklier twitchier twitterer twoseater uitlander unangular unblunder unbosomer unbundler uncandour uncannier unchaster uncleaner unclearer unclogger uncluster unclutter uncoupler uncouther undecamer underbear underdoer undergoer underhair underlier underseer underuser underwear undulator unfussier ungodlier unhandier unhappier unharbour unicolour unicycler unifoliar uniformer unilinear unioniser unionizer uniplanar unluckier unmanlier unpopular unquieter unreadier unriddler unsecular unshatter unshutter unsimilar unsounder unstabler unsticker unstopper untrusser upbraider upbuilder upholster uplighter upreacher uprighter upsampler upspeaker upthunder uptighter urostylar utricular valvassor vaporiser vaporizer varityper varnisher vasemaker vasomotor vehicular veilmaker velvetier venerator verbifier versifier versioner vesicular vialmaker victualer vignetter visitator vitaliser vitalizer vivandier vocabular vocaliser vocalizer voiceover voiturier voltigeur voltmeter volumeter volunteer voorkamer voxeliser voxelizer wadsetter wallpaper wambenger wardialer wardrober warmonger warranter warrantor washwater wassailer wasteweir wattmeter wavemaker wavemeter wavepower waxflower waxworker wealthier weaponeer weaseller weatherer webcaster weblogger webmaster weekender weightier wellanear wellmaker westerner whencever whichever whimperer whipmaker whisperer whittawer whosoever wigwagger willinger willmaker willowier willpower windhover windpower windrower windshear winemaker wingchair winterier wiremaker witmonger witnesser woefuller womaniser womanizer womanlier woodborer worcester wordmaker worldlier worshiper wreathier wrigglier wrinklier writmaker wrongdoer xylometer yellowier youngster zeitgeber zigzagger zookeeper zymometer