There are 571 fourteen-letter words containing A, M and 2N, https://www.bestwordlist.com/c/a/4/14letterwordswithamnn.htm
ABOMINABLENESS ABSENTMINDEDLY ABSTENTIONISMS ACCOMPANIMENTS ACETAMINOPHENS
ACKNOWLEDGMENT ACTINOURANIUMS ADENOCARCINOMA ADMINICULATING ADMINISTRATING
ADMINISTRATION AFOREMENTIONED AGGIORNAMENTOS AGGRANDISEMENT AGGRANDIZEMENT
ALIMENTIVENESS AMBULANCEWOMAN AMBULANCEWOMEN AMENABLENESSES AMINOPHENAZONE
AMINOPHYLLINES AMMONIFICATION ANAMNESTICALLY ANATHEMATISING ANATHEMATIZING
ANATOMISATIONS ANATOMIZATIONS ANDROCENTRISMS ANDROMEDOTOXIN ANDROMONOECISM
ANIMADVERSIONS ANIMALISATIONS ANIMALIZATIONS ANNEXATIONISMS ANONYMISATIONS
ANONYMIZATIONS ANTEPENULTIMAS ANTHELMINTHICS ANTICOMMUNISMS ANTICOMMUNISTS
ANTIDEFAMATION ANTIGOVERNMENT ANTIHARASSMENT ANTIHELMINTHIC ANTIHISTAMINES
ANTIHISTAMINIC ANTIHUMANISTIC ANTIMANAGEMENT ANTIMECHANISTS ANTIMODERNISTS
ANTIMONARCHIST ANTIMONOPOLIES ANTIMONOPOLIST ANTINOMIANISMS ANTIQUARIANISM
APPERTAINMENTS APPORTIONMENTS APPRENTICEMENT ARGUMENTATIONS ARRONDISSEMENT
ASCERTAINMENTS BILDUNGSROMANS BIOCONTAINMENT BITUMINISATION BITUMINIZATION
BRAINSTORMINGS BRINKSMANSHIPS CABINETMAKINGS CENTENARIANISM CHONDROCRANIUM
CHONDROSAMINES CIRCUMFORANEAN CIRCUMNUTATING CIRCUMNUTATION CIRCUMSTANCING
COGNOMINATIONS COMMANDANTSHIP COMMENSURATION COMMONSENSICAL COMMUNICATIONS
COMMUNISATIONS COMMUNITARIANS COMMUNIZATIONS COMPAGINATIONS COMPANIONHOODS
COMPANIONSHIPS COMPARTMENTING COMPENSATIONAL CONCOMITANCIES CONFIRMATIONAL
CONFORMATIONAL CONGLOMERATING CONGLOMERATION CONNUMERATIONS CONTAMINATIONS
CONTEMPERATION CONTEMPLATIONS CONTEMPORANEAN CONTINENTALISM CONTRABANDISMS
CONTRARIANISMS COSCINOMANCIES COUNTERDEMANDS COUNTERMANDING CYANOCOBALAMIN
CYANOGENAMIDES DAMNABLENESSES DAMNIFICATIONS DEAMINISATIONS DEAMINIZATIONS
DECOMPENSATING DECOMPENSATION DECONTAMINANTS DECONTAMINATED DECONTAMINATES
DECONTAMINATOR DEFEMINISATION DEFEMINIZATION DEHUMANISATION DEHUMANIZATION
DEMINERALISING DEMINERALIZING DEMONETARISING DEMONETARIZING DEMONETISATION
DEMONETIZATION DEMONSTRATIONS DEMYELINATIONS DENOMINATIONAL DENOMINATIVELY
DEPIGMENTATION DETERMINATIONS DIMENHYDRINATE DIMENSIONALITY DIPHENYLAMINES
DISAPPOINTMENT DISARRANGEMENT DISCRIMINATING DISCRIMINATION DISEMBRANGLING
DISENABLEMENTS DISENCHANTMENT DISENCUMBRANCE DISENGAGEMENTS DISENTAILMENTS
DISENTHRALMENT DISENTRAINMENT DISHARMONISING DISHARMONIZING DISHEARTENMENT
DISINFORMATION DISMANTLEMENTS DISSEMINATIONS DOCUMENTARIANS DOCUMENTATIONS
ECONOMETRICIAN ECONOMISATIONS ECONOMIZATIONS EFFEMINATENESS ELEMENTARINESS
EMBRANGLEMENTS EMOTIONALISING EMOTIONALIZING ENANTIODROMIAS ENANTIOMORPHIC
ENCOMPASSMENTS ENCOURAGEMENTS ENDEAVOURMENTS ENHARMONICALLY ENTERTAINMENTS
ENTOMOSTRACANS ENVENOMISATION ENVENOMIZATION EXTENSIONALISM EXTERMINATIONS
FASHIONMONGERS FASHIONMONGING FEARMONGERINGS FERROMAGNESIAN FERROMANGANESE
FLANNELMOUTHED FORAMINIFERANS FOREORDAINMENT FRAGMENTATIONS FRANCHISEMENTS
FRONTIERSWOMAN FUNAMBULATIONS FUNCTIONALISMS FUNDAMENTALISM FUNDAMENTALIST
FUNDAMENTALITY GARNISHEEMENTS GEMEINSCHAFTEN GENERATIONISMS GENTLEMANHOODS
GENTLEMANLIEST GENTLEMANSHIPS GERMANISATIONS GERMANIZATIONS GERRYMANDERING
GOVERNMENTALLY GRANTSMANSHIPS GYNANDROMORPHS GYNANDROMORPHY HAEMAGGLUTININ
HANDICRAFTSMAN HANDICRAFTSMEN HANDSOMENESSES HARMONIOUSNESS HARMONISATIONS
HARMONIZATIONS HATEMONGERINGS HAUSSMANNISING HAUSSMANNIZING HEMAGGLUTININS
HOMOGENISATION HOMOGENIZATION HOMOTRANSPLANT ILLUMINATINGLY ILLUMINATIONAL
IMAGINABLENESS IMMUNOREACTION IMPENETRATIONS IMPERMANENCIES IMPERSONATIONS
IMPIGNORATIONS IMPLEMENTATION INCOMMENSURATE INCOMMUNICABLE INCOMMUNICABLY
INCOMPLIANCIES INCREMENTALISM INCREMENTALIST INCRIMINATIONS INDEMONSTRABLE
INDEMONSTRABLY INDETERMINABLE INDETERMINABLY INDISCRIMINATE INFAMOUSNESSES
INFINITESIMALS INFORMATICIANS INHARMONIOUSLY INIMICALNESSES INIMITABLENESS
INNUMERABILITY INSPIRATIONISM INSTRUMENTALLY INSURMOUNTABLE INSURMOUNTABLY
INTEMERATENESS INTERACTIONISM INTERANIMATION INTERCOMPANIES INTERCOMPARING
INTERLACEMENTS INTERLAMINATED INTERLAMINATES INTERMEDIATING INTERMEDIATION
INTERMEMBRANES INTERMENSTRUAL INTERMIGRATION INTERSEGMENTAL INTERTERMINALS
INTERWEAVEMENT INTIMATENESSES INTIMIDATINGLY INTRANSMUTABLE INTUITIONALISM
JERRYMANDERING LAMENTABLENESS MACCHERONCINIS MACHINEGUNNING MACRONUTRIENTS
MAGNETISATIONS MAGNETIZATIONS MAGNIFICATIONS MAGNILOQUENCES MAGNILOQUENTLY
MAIDENLINESSES MAINSTREAMINGS MAINSTREETINGS MALCONTENTEDLY MALFUNCTIONING
MALIMPRINTINGS MANAGEABLENESS MANIFESTATIONS MANIFESTNESSES MANIFOLDNESSES
MANNERLESSNESS MANNERLINESSES MANUFACTURINGS MATRONLINESSES MEANINGFULNESS
MECHANICALNESS MECHANISATIONS MECHANIZATIONS MELANCHOLINESS MENDACIOUSNESS
MERCHANDISINGS MERCHANDIZINGS MESENCEPHALONS METACOGNITIONS METENCEPHALONS
METHYLXANTHINE MICRONISATIONS MICRONIZATIONS MICROPLANKTONS MILITANTNESSES
MILLENARIANISM MILLENNIALISMS MILLENNIALISTS MILLENNIANISMS MILLENNIARISMS
MILLIONNAIRESS MINERALISATION MINERALIZATION MINERALOGISING MINERALOGIZING
MISARRANGEMENT MISCEGENATIONS MISCELLANARIAN MISCHANNELLING MISGOVERNANCES
MISGOVERNAUNCE MISINFORMATION MISMANAGEMENTS MISORIENTATION MISPUNCTUATING
MISPUNCTUATION MISSIONARISING MISSIONARIZING MISSIONISATION MISSIONIZATION
MISTAKENNESSES MISTRANSLATING MISTRANSLATION MISUNDERSTANDS MODERNISATIONS
MODERNIZATIONS MONGRELISATION MONGRELIZATION MONOGAMOUSNESS MONOLINGUALISM
MONOMANIACALLY MONOPHONICALLY MONOPOLISATION MONOPOLIZATION MONOPRIONIDIAN
MONOPROPELLANT MONOUNSATURATE MONUMENTALISED MONUMENTALISES MONUMENTALIZED
MONUMENTALIZES MORPHINOMANIAC MORPHINOMANIAS MOUNTAINBOARDS MOUNTAINEERING
MOUNTEBANKINGS MOUNTEBANKISMS MULTINATIONALS MUNDIFICATIONS MUNICIPALISING
MUNICIPALIZING MYELENCEPHALON MYLONITISATION MYLONITIZATION NAMELESSNESSES
NANOCOMPOSITES NAPHTHYLAMINES NECESSARIANISM NEMATHELMINTHS NEOCOLONIALISM
NEOGRAMMARIANS NEURAMINIDASES NEUROANATOMIES NEUROANATOMIST NEUROMARKETING
NEWSPAPERWOMAN NEWSPAPERWOMEN NOCTAMBULATION NOMENCLATORIAL NOMINALISATION
NOMINALIZATION NONACHIEVEMENT NONATTACHMENTS NONCHARISMATIC NONCHROMOSOMAL
NONCOMMITTALLY NONCOMMUNICANT NONCOMMUTATIVE NONCOMPLIANCES NONCOMPLICATED
NONCONFORMANCE NONDIMENSIONAL NONDOCUMENTARY NONENGAGEMENTS NONFILAMENTOUS
NONGEOMETRICAL NONGRAMMATICAL NONHOMOSEXUALS NONIMPLICATION NONIMPORTATION
NONINFLAMMABLE NONINFORMATION NONINSTALLMENT NONJUDGEMENTAL NONMAINSTREAMS
NONMANAGEMENTS NONMECHANISTIC NONMONETARISTS NONPERFORMANCE NONPROGRAMMERS
NONRECOMBINANT NONSYMMETRICAL NONTEMPORALITY NONTERMINATING NORMALISATIONS
NORMALIZATIONS NYMPHOMANIACAL ORNAMENTATIONS ORNITHOMANCIES OUTMANEUVERING
OUTMANOEUVRING OVERDOMINANCES OVERMANAGEMENT OVERORNAMENTED PANHARMONICONS
PARALEIPOMENON PARCHMENTISING PARCHMENTIZING PARLIAMENTINGS PARTITIONMENTS
PENICILLAMINES PHENETHYLAMINE PHENMETRAZINES PHENOMENALISED PHENOMENALISES
PHENOMENALISMS PHENOMENALISTS PHENOMENALIZED PHENOMENALIZES PNEUMODYNAMICS
POSTMILLENNIAL PREADMONISHING PREADMONITIONS PREARRANGEMENT PREDOMINANCIES
PREDOMINATIONS PREMILLENARIAN PREMILLENNIALS PRENOMINATIONS PREORDAINMENTS
PRESENTIMENTAL PRETERMINATION PRONOMINALISED PRONOMINALISES PRONOMINALIZED
PRONOMINALIZES PRONUNCIAMENTO RANDOMISATIONS RANDOMIZATIONS REAPPOINTMENTS
REARRANGEMENTS RECOMBINATIONS RECOMMENDATION RECONFIRMATION RECONTAMINATED
RECONTAMINATES RECRIMINATIONS REEXAMINATIONS REFASHIONMENTS REGIMENTATIONS
REHUMANIZATION REIMPLANTATION REINSTATEMENTS REMINERALISING REMINERALIZING
REMINISCENTIAL REMONETISATION REMONETIZATION REMONSTRATIONS REPRESENTAMENS
RETRANSFORMING RETRANSMISSION RETRANSMITTING RHODOMONTADING ROENTGENOGRAMS
SACRAMENTARIAN SANITARIANISMS SCANDALMONGERS SCAREMONGERING SCRIMSHANDYING
SEDIMENTATIONS SEMICENTENNIAL SEMICONSONANTS SENSATIONALISM SENTIMENTALISE
SENTIMENTALISM SENTIMENTALIST SENTIMENTALITY SENTIMENTALIZE SOLEMNISATIONS
SOLEMNIZATIONS SOMNAMBULANCES SOMNAMBULATING SOMNAMBULATION SQUANDERMANIAS
STONEMASONRIES SULFONMETHANES SULPHONMETHANE SUPERDOMINANTS SUPERHUMANNESS
SUPERPHENOMENA TERMINABLENESS THERMOREMANENT TRANSABDOMINAL TRANSAMINATION
TRANSFORMATION TRANSGENDERISM TRANSMIGRATING TRANSMIGRATION TRANSMISSIONAL
TRANSMITTANCES TRANSMUTATIONS TRANSSHIPMENTS TRIAMCINOLONES TRIDIMENSIONAL
TRIPHENYLAMINE ULTRAMONTANISM ULTRAMONTANIST UNAMBIVALENTLY UNASSUMINGNESS
UNCOMMUNICABLE UNCOMMUNICATED UNCONTAMINATED UNCONTEMPLATED UNCONTEMPORARY
UNDEMONSTRABLE UNDEMONSTRATED UNDERSTATEMENT UNDETERMINABLE UNDETERMINABLY
UNDIMINISHABLE UNEMBARRASSING UNFLAMBOYANTLY UNHANDSOMENESS UNIDIMENSIONAL
UNIFORMITARIAN UNILINGUALISMS UNILLUMINATING UNINTIMIDATING UNMAINTAINABLE
UNMANNERLINESS UNMANUFACTURED UNMENTIONABLES UNMERCHANTABLE UNREMUNERATIVE
UNROMANTICALLY UNROMANTICISED UNROMANTICIZED UNSECTARIANISM UNSURMOUNTABLE
UNSYMPATHISING UNSYMPATHIZING UNTAMEABLENESS UNTRANSMUTABLE WOMANISHNESSES
XANTHOMELANOUS