Mammoth Uncensored Word List:
157 words ending with ls, 12 letters long

advertorials affluentials allopurinols aminophenols amobarbitals anisodactyls antiliberals antiradicals artiodactyls audiovisuals axerophthols biochemicals biomaterials bloodvessels bristletails bromouracils centrifugals chlorophylls cholesterols chrysoberyls citronellals citronellols clenbuterols cockleshells conditionals continentals coprincipals coprosterols counterfoils counterseals countervails cupboardfuls cupronickels detrimentals diacriticals dimercaprols disapprovals disenthralls duniewassals equilaterals equinoctials evangelicals exceptionals exponentials ferronickels fingerstalls flickertails fundamentals gemfibrozils gerontophils groundswells haloperidols hexadecimals hydroquinols hypoglossals ichnofossils incrementals inessentials influentials infomercials intercostals interschools kinderspiels knuckleballs kriegsspiels labiodentals leptodactyls macrofossils maintopsails microcephals microfibrils microfossils microtunnels midlittorals misbestowals monocrystals monolinguals multinomials myoinositols nanocrystals neanderthals neurofibrils nonagesimals nonchemicals nonclericals noncriminals nonhospitals nonnationals nonofficials nonparallels nonresiduals nontemporals nonterminals overarousals overcontrols overfulfills paddlewheels paracetamols paramedicals participials penitentials pentadactyls phytosterols polyalcohols polycrystals preapprovals predisposals propranolols provisionals pterodactyls quadrennials racquetballs reappraisals rearadmirals recessionals recommittals resveratrols retraversals retrosexuals rhynchocoels sacramentals sacrocostals scissortails sclerophylls semidiurnals sexagesimals steamshovels stilbestrols subcardinals subintervals sublittorals substantials sulphhydryls superficials superschools surrebuttals swallowtails teaspoonfuls telecontrols terrestrials territorials testimonials tetradactyls thioalcohols trackerballs transferrals transmittals transportals transsexuals transversals turtleshells underfulfils unessentials weathergirls wherewithals whipoorwills xanthophylls