There are 419 fourteen-letter words containing A, I, M, N and U, https://www.bestwordlist.com/c/a/5/14letterwordswithaimnu.htm ABSTEMIOUSNESS ACCUSTOMATIONS ACTINOMORPHOUS ACTINOMYCETOUS ACTINOURANIUMS ADIATHERMANOUS ADMINICULATING ALPHANUMERICAL AMATEURISHNESS AMINOACIDURIAS AMPHIBIOUSNESS ANGIOSTOMATOUS ANTEPENULTIMAS ANTHROPOPHUISM ANTICOMMUNISMS ANTICOMMUNISTS ANTIHOMOSEXUAL ANTIHUMANISTIC ANTIQUARIANISM ANTIRHEUMATICS ANTIRITUALISMS ARGUMENTATIONS ARMAMENTARIUMS AUDIOMETRICIAN AUGMENTATIVELY AUTOCHTHONISMS AUTOIMMUNITIES AUTOMATISATION AUTOMATIZATION BALSAMINACEOUS BILDUNGSROMANS BITUMINISATION BITUMINIZATION CALAMITOUSNESS CATECHUMENICAL CATECHUMENISMS CATECHUMENSHIP CERULOPLASMINS CHONDROCRANIUM CHURCHMANLIEST CHURCHMANSHIPS CIRCUMAMBIENCE CIRCUMAMBIENCY CIRCUMFORANEAN CIRCUMGYRATING CIRCUMGYRATION CIRCUMNAVIGATE CIRCUMNUTATING CIRCUMNUTATION CIRCUMNUTATORY CIRCUMROTATING CIRCUMSTANCING CIRCUMSTANTIAL COMMENSURATION COMMUNAUTAIRES COMMUNICATIONS COMMUNISATIONS COMMUNITARIANS COMMUNIZATIONS CONCEPTUALISMS CONNUMERATIONS CONSERVATORIUM CONTUMACIOUSLY COUNTERCLAIMED COUNTERMANDING CUMULATIVENESS CUSTOMISATIONS CUSTOMIZATIONS CYANOBACTERIUM DECAMETHONIUMS DEHUMANISATION DEHUMANIZATION DENUMERABILITY DIAMANTIFEROUS DIAMONDIFEROUS DISACCUSTOMING DISAMBIGUATING DISAMBIGUATION DISCIPLINARIUM DISCOURAGEMENT DISENCUMBRANCE DISFEATUREMENT DISILLUMINATED DISILLUMINATES DISSIMULATIONS DOCUMENTALISTS DOCUMENTARIANS DOCUMENTARISED DOCUMENTARISES DOCUMENTARISTS DOCUMENTARIZED DOCUMENTARIZES DOCUMENTATIONS DUNDERHEADISMS ECUMENICALISMS ELEUTHEROMANIA EMULSIFICATION EQUESTRIANISMS EUDEMONISTICAL EVANGELIARIUMS EXCOMMUNICABLE EXCOMMUNICATED EXCOMMUNICATES EXCOMMUNICATOR FLUNITRAZEPAMS FORAMINIFEROUS FRUITARIANISMS FUNAMBULATIONS FUNCTIONALISMS FUNDAMENTALISM FUNDAMENTALIST FUNDAMENTALITY GEWURZTRAMINER HAEMAGGLUTININ HAEMODILUTIONS HARMONIOUSNESS HAUSSMANNISING HAUSSMANNIZING HEMAGGLUTINATE HEMAGGLUTININS HEMOGLOBINURIA HEXAMETHONIUMS HOUGHMAGANDIES HUMANISTICALLY HUMBLEBRAGGING HUMIDIFICATION HYDROPNEUMATIC HYPERMASCULINE HYPERURBANISMS ILLUMINATINGLY ILLUMINATIONAL IMMACULATENESS IMMATURENESSES IMMUNOASSAYIST IMMUNOCHEMICAL IMMUNOREACTION IMMUNOREACTIVE IMPERTURBATION IMPOSTHUMATING IMPOSTHUMATION IMPOSTUMATIONS INCOMMENSURATE INCOMMUNICABLE INCOMMUNICABLY INDIVIDUALISMS INDUSTRIALISMS INFAMOUSNESSES INHARMONIOUSLY INNUMERABILITY INSTRUMENTALLY INSURMOUNTABLE INSURMOUNTABLY INTERAMBULACRA INTERMENSTRUAL INTERMOLECULAR INTERSEXUALISM INTRAMEDULLARY INTRAMERCURIAL INTRAMOLECULAR INTRANSMUTABLE INTUITIONALISM LIQUIDATIONISM MACHINEGUNNING MACROEVOLUTION MACROGLOBULINS MACROMUTATIONS MACRONUTRIENTS MAGNILOQUENCES MAGNILOQUENTLY MALFUNCTIONING MANIPULABILITY MANIPULATIVELY MANRIKIGUSARIS MANUFACTURINGS MATRICULATIONS MEANINGFULNESS MEGALOSAURIANS MEGASPORANGIUM MENDACIOUSNESS MERCAPTOPURINE MERCURIALISING MERCURIALIZING METACOMPUTINGS METALINGUISTIC MICROMINIATURE MICROPULSATION MINICALCULATOR MIRACULOUSNESS MISADJUSTMENTS MISADVENTURERS MISADVENTUROUS MISASSUMPTIONS MISATTRIBUTING MISATTRIBUTION MISCALCULATING MISCALCULATION MISCATALOGUING MISCOMPUTATION MISEVALUATIONS MISGOVERNAUNCE MISMEASUREMENT MISPERSUASIONS MISPUNCTUATING MISPUNCTUATION MISUNDERSTANDS MISUTILISATION MISUTILIZATION MOCKUMENTARIES MONOLINGUALISM MONUMENTALISED MONUMENTALISES MONUMENTALIZED MONUMENTALIZES MORDACIOUSNESS MOUNTAINBOARDS MOUNTAINEERING MOUNTEBANKINGS MOUNTEBANKISMS MOUSETRAPPINGS MUCILAGINOUSLY MULLIGATAWNIES MULTICANDIDATE MULTIFILAMENTS MULTILINGUALLY MULTILOCATIONS MULTINATIONALS MULTINUCLEATED MULTINUCLEOLAR MULTIPLATINUMS MULTIPLICATION MULTIPOTENTIAL MULTITERMINALS MULTITHREADING MULTIVALENCIES MUMMIFICATIONS MUNDIFICATIONS MUNDIFICATIVES MUNICIPALISING MUNICIPALITIES MUNICIPALIZING MUSICALISATION MUSICALIZATION MUTAGENICITIES MUTUALISATIONS MUTUALIZATIONS NEURAMINIDASES NEUROANATOMIES NEUROANATOMIST NEUROCHEMICALS NEUROFIBROMATA NEUROMARKETING NITROBACTERIUM NOCTAMBULATION NONCOMMUNICANT NONCOMMUTATIVE NONFILAMENTOUS NUMERABILITIES NUMISMATICALLY OMBUDSMANSHIPS OSMOREGULATION OUTMANEUVERING OUTMANIPULATED OUTMANIPULATES OUTMANOEUVRING OVERENTHUSIASM PARAJOURNALISM PARSIMONIOUSLY PERAMBULATIONS PERIMENOPAUSAL PERIMENOPAUSES PLATINIRIDIUMS PLOUGHMANSHIPS PNEUMATICITIES PNEUMATOLOGIES PNEUMATOLOGIST PNEUMOBACILLUS PNEUMODYNAMICS PNEUMOGASTRICS POCOCURANTEISM POCOCURANTISMS POLEMONIACEOUS POSTAMPUTATION PREFORMULATING PREMANDIBULARS PRONUNCIAMENTO PROTOACTINIUMS PRUDENTIALISMS QUADRIGEMINATE QUADRIGEMINOUS QUALMISHNESSES QUARTODECIMANS QUATTROCENTISM QUINQUAGESIMAL RADIOSTRONTIUM RAMBUNCTIOUSLY RECOMPUTATIONS REFORMULATIONS REHUMANIZATION REMUNERABILITY REMUNERATIVELY REPUBLICANISMS RESTIMULATIONS SANSCULOTTISMS SCAPULIMANCIES SCAPULOMANCIES SEMIAUTONOMOUS SIMULTANEITIES SIMULTANEOUSES SIMULTANEOUSLY SOMNAMBULATING SOMNAMBULATION SOMNAMBULISTIC SPERMATOGONIUM SQUANDERMANIAS SUBMANDIBULARS SUBMETACENTRIC SUBMINIATURISE SUBMINIATURIZE SUBNORMALITIES SUBSTANTIALISM SUFFUMIGATIONS SULFADIMIDINES SULFAMETHAZINE SULFANILAMIDES SULPHANILAMIDE SUMMARISATIONS SUMMARIZATIONS SUMMERSAULTING SUPERCRIMINALS SUPERDOMINANTS SUPERHUMANISED SUPERHUMANISES SUPERHUMANIZED SUPERHUMANIZES SUPERIMPORTANT SUPERMASCULINE SUPERMILITANTS SUPERNORMALITY SUPERORGANISMS SUPRALIMINALLY TAUTOCHRONISMS TELEJOURNALISM THAUMATOGENIES TRANSEXUALISMS TRANSMUTATIONS TRANSSEXUALISM TRAUMATISATION TRAUMATIZATION TRILINGUALISMS TROUBLEMAKINGS TURBOMACHINERY ULTIMATENESSES ULTRAMASCULINE ULTRAMILITANTS ULTRAMINIATURE ULTRAMODERNISM ULTRAMODERNIST ULTRAMONTANISM ULTRAMONTANIST ULTRAROMANTICS UNACADEMICALLY UNACCLIMATISED UNACCLIMATIZED UNACCOMPLISHED UNAMBIVALENTLY UNAMIABILITIES UNASSUMINGNESS UNATHLETICISMS UNCOMMUNICABLE UNCOMMUNICATED UNCONTAMINATED UNDEREMPHASISE UNDEREMPHASIZE UNDERESTIMATED UNDERESTIMATES UNDETERMINABLE UNDETERMINABLY UNDIMINISHABLE UNDOGMATICALLY UNDOMESTICATED UNDOMESTICATES UNDRAMATICALLY UNEMBARRASSING UNEMPHATICALLY UNICAMERALISMS UNICAMERALISTS UNIDIMENSIONAL UNIFORMITARIAN UNILATERALISMS UNILINGUALISMS UNILLUMINATING UNINTIMIDATING UNMAINTAINABLE UNMALLEABILITY UNMANNERLINESS UNMARRIAGEABLE UNMATERIALISED UNMATERIALIZED UNMATHEMATICAL UNMATRICULATED UNMENTIONABLES UNMETAPHORICAL UNMETAPHYSICAL UNPREMEDITABLE UNPREMEDITATED UNREMUNERATIVE UNRHYTHMICALLY UNROMANTICALLY UNROMANTICISED UNROMANTICIZED UNSECTARIANISM UNSYMPATHISING UNSYMPATHIZING UNSYSTEMATICAL UNSYSTEMATISED UNSYSTEMATIZED UTILITARIANISM VERMICULATIONS VERNACULARISMS