Mammoth Uncensored Word List:
333 words ending with us, 13 letters long

acotyledonous allochthonous aluminiferous amarantaceous ambidexterous ambrosiaceous amphitrichous amygdalaceous angiospermous anisophyllous antenniferous antireligious aphanipterous argentiferous argilliferous arteriovenous arthrosporous arundinaceous autocephalous autochthonous balsamiferous bibliolatrous bignoniaceous boraginaceous brachiosaurus brachypterous braggadocious brassicaceous bromeliaceous calcariferous camphoraceous carboniferous carcinomatous cartilaginous cavernicolous celluliferous cephalopodous chondromatous chromophilous chromophorous cinchonaceous cleistogamous cobaltiferous coccobacillus coelacanthous condylomatous conscientious consectaneous consentaneous coralliferous coralligenous crassulaceous cumulostratus cyclospermous cylindraceous demeritorious dialypetalous diathermanous dichlamydeous disceptatious discommodious discomycetous discontiguous discontinuous disharmonious dolichosaurus eccremocarpus electrophorus emphysematous enterocoelous entomophagous entomophilous eosinophilous equisetaceous erysipelatous exanthematous exsanguineous fermentitious fibrinogenous filibusterous filipendulous fortitudinous fossiliferous fractocumulus fractostratus frumentaceous frumentarious garnetiferous gasteropodous gastrocnemius geitonogamous gentianaceous globuliferous graminicolous graminivorous grandiloquous granuliferous granulomatous gymnospermous gynodioecious haematogenous hematophagous heterocarpous heteroclitous heterocystous heterogeneous heteropterous heterosporous heterostylous heterotactous hexadactylous homeomorphous homeothermous hydrocephalus hydrosomatous hymenopterous hypercautious hypersensuous hypertrophous hysteranthous ichthyosaurus iliococcygeus inconspicuous inefficacious inhomogeneous insectivorous instantaneous interstimulus intravitreous isodimorphous isospondylous juglandaceous kinetonucleus lactobacillus lepidopterous leptocephalus leptophyllous lissotrichous magnitudinous magnoliaceous malacophilous mammaliferous manganiferous medicamentous megacephalous melancholious melanochroous membranaceous meningococcus menorhynchous mesocephalous metalliferous microcephalus microphyllous miscellaneous monodactylous monothalamous monotrematous morbillivirus mucocutaneous multitudinous mycetophagous myxoedematous nasomaculatus nectariferous nectarivorous nickeliferous nonadulterous nonautonomous nonbituminous noncontagious noncontiguous noncontinuous noncourageous noneczematous nonextraneous nonfallacious nongangrenous nongelatinous nongregarious nonhomologous nonindigenous noninfectious nonkeratinous nonleguminous nonmembranous nonmonogamous nonmonotonous nonnutritious nonslanderous nonsulphurous nonsynonymous nontraitorous nontumultuous nonviviparous nymphaeaceous odontophorous ommatophorous ophiomorphous orthognathous orthostichous ostreophagous overambitious overconscious overcredulous overingenious overluxurious overrighteous ovoviviparous palatoglossus papaveraceous papilliferous papillomatous paramyxovirus pentadelphous pentastichous perspicacious petroliferous petrosquamous phanerogamous phycomycetous phyllophagous physoclistous plagiostomous plagiotropous platiniferous platitudinous platycephalus plectopterous plenitudinous pleurocarpous polleniferous polliniferous polyadelphous polychotomous polydactylous polygalaceous polygonaceous polythalamous porcelaineous porcellaneous postliminious profectitious prolegomenous propitiatious protanomalous proteinaceous proterandrous proterogynous psammophilous pseudocarpous pucciniaceous pusillanimous quadrifarious quartziferous rectitudinous reptiliferous rhizomorphous rhopalocerous salviniaceous sanctimonious sarmentaceous saurognathous schizaeaceous schizocarpous sclerocaulous sclerodermous semiconscious semioblivious semioviparous semireligious serendipitous simarubaceous skeletogenous solidungulous sphagnicolous spinuliferous splendiferous stalactitious staminiferous steganopodous stenopetalous stenophyllous stercoraceous stercorarious stoloniferous stratocumulus streptocarpus streptococcus strobilaceous subbituminous subcontiguous subcontinuous subcoriaceous subreptitious subterraneous supercautious supersensuous superstitious supervigorous supraspinatus surreptitious syphilomatous tauromorphous tautochronous tetradynamous tetrastichous thermophilous toxicophagous treponematous trichopterous tritanomalous tubuliflorous tyrannosaurus ultracautious umbelliferous unadventurous unceremonious uncontentious unduplicitous unmellifluous unmeritorious unpretentious unsuperfluous unsynchronous ustilagineous ventriloquous vitelligenous xanthochroous xerodermatous xiphophyllous zinjanthropus zygodactylous