Mammoth Uncensored Word List:
516 words ending with er, 12 letters long

acclimatiser acclimatizer accomplisher acknowledger afterfeather agriculturer agroforester airfreighter albumblatter alcoholmeter alphabetiser alphabetizer amphitheater angiographer animadverter anthologiser anthologizer anticonsumer arithmometer backgrounder bakingpowder balladmonger basketballer basketweaver beautifuller bellowsmaker bellyflopper bellylaugher biscuitmaker blanketmaker bloodshedder bloodspiller bonnyclabber bootstrapper bottleholder boulevardier brainstormer brassfounder breastsummer breathaliser breathalyser breathalyzer breechloader brickfielder bridgekeeper bridgemaster broncobuster cabinetmaker cackermander calligrapher campanologer candleholder cardioverter carpetbagger carpetmonger cartographer cathetometer cephalometer checkweigher cheeseburger cheesecutter cheesehopper cheesemonger cheesetaster childproofer chirographer chloroformer choregrapher chorographer chorusmaster chromocenter circulariser circularizer circumcenter circumventer clockwatcher coachbuilder codiscoverer coffeegrower commissioner communaliser communalizer complimenter concessioner confectioner conferencier contradicter controverter conventicler conventioner cookiecutter coresearcher correctioner cosmographer costermonger coulombmeter countenancer counteroffer counterorder counterpower crossbencher crossbreeder crosschecker crossdresser crosshatcher crystalliser crystallizer cuckooflower datarecorder decarboniser decarbonizer declinometer decolouriser decolourizer deemphasizer defragmenter dehumidifier demagnetiser demagnetizer democratiser democratizer densitometer deprogrammer dereferencer desensitiser desensitizer destabiliser destabilizer desulfuriser desulfurizer diastereomer disappointer disassembler discographer discommender disconnecter discontinuer disenchanter disorganiser disorganizer disqualifier doppelganger doubledealer doubledecker doubleheader eavesdropper ebulliometer effusiometer electrolyser electrolyzer electrometer electrotyper empoverisher encumbrancer endosmometer enfranchiser ethnographer evaporimeter evaporometer everywhither exhibitioner experimenter extemporiser extemporizer extensimeter extensometer extinguisher familiariser familiarizer fennelflower festivalgoer filibusterer filterfeeder flameproofer flamethrower flowerseller foreshadower formulariser formularizer foundationer freightliner frontbencher frostproofer galactometer galvanometer garmentmaker gastrosopher globetrotter gollywhomper gossipmonger grandstander graphplotter gravitometer greenskeeper groundkeeper hagiographer hairsplitter handicrafter harbormaster harmonometer harquebusier hasenpfeffer headshrinker heartbreaker heliographer hephthemimer hierographer holidaymaker homeschooler homotetramer honeycreeper horsewhipper housebreaker housebuilder housecleaner housepainter housewrecker hydrocracker hydrographer hymnographer hypothesiser hypothesizer iambographer iconographer immortaliser immortalizer impoverisher inclinometer interchanger interchapter intercluster intermeddler interpleader interpolater isoperimeter jitterbugger katharometer katzenjammer kinesiometer kirschwasser klipspringer laserprinter laundryowner leathermaker letterwriter lightproofer lithoglypher lithographer lithotripter macroweather magnetometer manslaughter manufacturer mastersinger materialiser materializer memorialiser memorializer merchandiser merchandizer metacomputer methanometer microammeter micrographer micromanager microprinter middlebuster milliammeter minicomputer misconceiver mollycoddler moneychanger moneygrubber motherfucker mouthbreeder mouthbrooder muckspreader muzzleloader mythographer mythologiser mythologizer nationaliser nationalizer neandertaler necrographer needlemonger needleworker nephelometer newsgatherer newsworthier nightclubber nightcrawler noncharacter nonconformer noncrossover nondistorter nonencounter nonexchanger nonfermenter nonforeigner nonlandowner nonmessenger nonpassenger nonperformer nonresponder nonsupporter nonsurrender nonvolunteer noteworthier officeholder olfactometer oneiromancer orchestrater orthographer oscillometer overachiever overengineer overproducer overregister paleographer pantographer pasqueflower pastrycutter patternmaker peanutbutter penetrometer pennypincher peppershaker petrographer phonographer photographer photopolymer phrasemonger phytographer pickpocketer picturemaker piezoscanner pledgeholder policyholder politicaster pornographer practitioner pralltriller preamplifier preoutfitter prepurchaser preslaughter pretermitter prizefighter processioner profitmonger proselytiser proselytizer psychrometer quarrymaster radiographer rationaliser rationalizer readminister reconnoitrer redemptioner rediscoverer relinquisher remembrancer reprographer resolutioner respirometer revolutioner rhabdomancer rhythmometer roadworthier rodomontader rollerblader rollerskater rubbernecker rumourmonger saloonkeeper sceneshifter scenographer schoolmaster schussboomer screenwriter scrimshander scrimshanker scriptwriter semicylinder sensitometer sharecropper sharpshooter sheepshearer shellcracker shirtwaister shockproofer shortchanger sidesplitter silverplater skateboarder skeletoniser skeletonizer skinnydipper skrimshanker sledgehammer slockdolager slockdoliger slockdologer snakecharmer snobographer snollygoster soliloquiser soliloquizer soundproofer specksioneer specktioneer spectrometer speechreader speechwriter spellchecker sphygmometer sportscaster sportswriter springkeeper springloader squaredancer stainproofer standardiser standardizer stencilmaker stenographer stepdaughter stereocenter stereoisomer sternwheeler stickhandler stockbreeder stormproofer stormtrooper storyboarder straightener stratotanker streetkeeper streetwalker strengthener stressbuster strifemonger stringholder stuccoworker subcommander subtreasurer supercarrier supercharger supercluster superpartner superpolymer superteacher supplementer surrejoinder swashbuckler synchroniser synchronizer systematiser systematizer tachygrapher telecommuter telemarketer teleprompter tellurometer tenderometer theologaster thereinafter thimblemaker throughither throughother ticketholder titheprocter tollgatherer tracingpaper trailbreaker trainspotter tranquiliser tranquilizer transplanter transshipper trigonometer trocheameter troposcatter troublemaker trucebreaker turbidimeter turbocharger tympanometer underbuilder underpropper underskinker understander unfriendlier uranographer veggieburger videographer viscosimeter viticulturer waistcoateer waterdropper waterproofer waterstrider wealthmonger weathermaker weightlifter weisenheimer whencesoever wicketkeeper windowpeeper wondermonger woolgatherer wunderkinder yellowhammer zincographer