There are 710 twelve-letter words containing A, 3I and N, https://www.bestwordlist.com/c/a/5/12letterwordswithaiiin.htm ABIRRITATING ABOLITIONISM ABOLITIONIST ACCIPITRINES ACQUISITIONS AERIFICATION AEROBICISING AEROBICIZING AFFILIATIONS AGENTIVITIES ALBUMINISING ALBUMINIZING ALIENABILITY ALKALINISING ALKALINITIES ALKALINIZING AMOXICILLINS ANISEIKONIAS ANNIHILATING ANNIHILATION ANNIHILATIVE ANTIADITISES ANTIALIASING ANTICIPATING ANTICIPATION ANTICIPATIVE ANTICLINORIA ANTIDIABETIC ANTIDILUTION ANTIDIURETIC ANTIELITISMS ANTIELITISTS ANTIFEMININE ANTIFEMINISM ANTIFEMINIST ANTIFRICTION ANTIGENICITY ANTIMIGRAINE ANTIMILITARY ANTIMISSILES ANTIMITOTICS ANTIPERIODIC ANTIPOLITICS ANTIPRURITIC ANTIRACHITIC ANTIRELIGION ANTITHEISTIC ANTIVITAMINS APPENDICITIS AQUILINITIES ARTEMISININS ASEPTICISING ASEPTICIZING ASSIBILATING ASSIBILATION ASSIMILATING ASSIMILATION ASSOILZIEING ATTITUDINISE ATTITUDINIZE AUDIBILIZING AVITAMINOSIS AVITAMINOTIC AXIOMATISING AXIOMATIZING BASIFICATION BESTIALISING BESTIALIZING BIBLIOMANIAC BIBLIOMANIAS BILINGUALISM BILINGUALITY BILLIONAIRES BIMILLENNIAL BIOIDENTICAL BIOMETRICIAN BIPARTITIONS BIPOLARISING BIPOLARIZING BISOCIATIONS BITONALITIES BITUMINATING BOUGAINVILIA BRILLIANCIES BRILLIANTINE BRILLIANTING CALIGINOSITY CANONICITIES CAPITALISING CAPITALIZING CHARIVARIING CHAUVINISTIC CHRISTIANIAS CINEMATISING CINEMATIZING CINNARIZINES CITIFICATION CITYFICATION CIVILIANISED CIVILIANISES CIVILIANIZED CIVILIANIZES CIVILISATION CIVILIZATION CLASSICISING CLASSICIZING COALITIONISM COALITIONIST CODIFICATION CONCILIATING CONCILIATION CONCILIATIVE CONVIVIALIST CONVIVIALITY CORDIALISING CORDIALIZING CRIMINALISED CRIMINALISES CRIMINALISTS CRIMINALIZED CRIMINALIZES CRIMINATIONS CUTINISATION CUTINIZATION DEACIDIFYING DEBILITATING DEBILITATION DECIMALISING DECIMALIZING DEFILIATIONS DEFINABILITY DEFINITIONAL DEIFICATIONS DEIONISATION DEIONIZATION DELIMITATING DELIMITATION DERIVATISING DERIVATIZING DESALINISING DESALINIZING DEVIATIONISM DEVIATIONIST DEVITALISING DEVITALIZING DIALECTICIAN DIATONICISMS DICTIONARIES DIGITALISING DIGITALIZING DIGITISATION DIGITIZATION DIGLADIATING DIGLADIATION DIJUDICATING DIJUDICATION DILAPIDATING DILAPIDATION DILUCIDATING DILUCIDATION DIMERISATION DIMERIZATION DIMIDIATIONS DIMINISHABLE DIPRIONIDIAN DISAFFIRMING DISAMENITIES DISANIMATING DISANOINTING DISCIPLINANT DISCIPLINARY DISCRIMINANT DISCRIMINATE DISENTAILING DISIMAGINING DISINFLATION DISINTRICATE DISSIPATIONS DISSOCIATING DISSOCIATION DISTILLATION DITRANSITIVE DIVARICATING DIVARICATION DIVINATORIAL DIVINISATION DIVINIZATION DIVISIONALLY DRINKABILITY EARLIERISING EARLIERIZING EDIFICATIONS ELASTICISING ELASTICIZING ELICITATIONS ELIMINATIONS ENIGMATISING ENIGMATIZING ENSILABILITY EOSINOPHILIA EQUANIMITIES FACILITATING FACILITATION FACSIMILEING FAIRNITICKLE FAIRNITICLES FANATICISING FANATICIZING FELICITATING FELICITATION FEMINALITIES FEMINISATION FEMINIZATION FIBERISATION FIBERIZATION FIBRILLATING FIBRILLATION FICTIONALISE FICTIONALITY FICTIONALIZE FIMBRIATIONS FINALISATION FINALIZATION FINANCIALIST FINANCIERING FINICALITIES FISSILINGUAL FLUIDISATION FLUIDIZATION FRANGIBILITY FUSTIANISING FUSTIANIZING FUSTILIRIANS FUSTILLIRIAN FUTILITARIAN GAINSTRIVING GAMIFICATION GASIFICATION GELATINISING GELATINIZING GERIATRICIAN GIGANTICIDES GOLIATHISING GOLIATHIZING GONIATITOIDS GRAPHITISING GRAPHITIZING GRECIANISING GRECIANIZING HABILITATING HABILITATION HEPARINISING HEPARINIZING HISPANICISED HISPANICISES HISPANICISMS HISPANICIZED HISPANICIZES HISPANIOLISE HISPANIOLIZE HISTRIONICAL HOMINISATION HOMINIZATION HUMIFICATION HUMILIATIONS IDEALISATION IDEALIZATION IDENTIFIABLE IDENTIFIABLY IDOLATRISING IDOLATRIZING IDOLISATIONS IDOLIZATIONS IGNITABILITY ILLEGALISING ILLEGALIZING ILLIMITATION ILLIQUATIONS ILLUMINATING ILLUMINATION ILLUMINATIVE ILLUVIATIONS IMAGINATIONS IMAGINEERING IMBIBITIONAL IMBRICATIONS IMMIGRANCIES IMMIGRATIONS IMMISERATING IMMISERATION IMMUNISATION IMMUNIZATION IMPARADISING IMPASSIONING IMPLICATIONS INACTIVATING INACTIVATION INACTIVITIES INADMISSIBLE INADMISSIBLY INANIMATIONS INARTIFICIAL INAUDIBILITY INAUSPICIOUS INCAPABILITY INCAPACITIES INCENDIARIES INCENDIARISM INCINERATING INCINERATION INCLINATIONS INCLINATORIA INCOGITATIVE INCRIMINATED INCRIMINATES INCRIMINATOR INCURABILITY INDELICACIES INDICATIONAL INDICATIVELY INDIGNATIONS INDIVIDUALLY INDIVIDUATED INDIVIDUATES INDIVIDUATOR INEBRIATIONS INEFFABILITY INEFFICACIES INEFFICACITY INELASTICITY INEQUALITIES INERRABILITY INFAMONISING INFAMONIZING INFANTICIDAL INFANTICIDES INFANTILISED INFANTILISES INFANTILISMS INFANTILIZED INFANTILIZES INFIBULATING INFIBULATION INFILTRATING INFILTRATION INFILTRATIVE INFINITATING INFIRMARIANS INFLATIONISM INFLATIONIST INFURIATIONS INGEMINATING INGEMINATION INGRATIATING INGRATIATION INHABITATION INHUMANITIES INIMICALNESS INITIALISING INITIALIZING INITIATIVELY INITIATORIES INITIATRICES INITIATRIXES INJUDICIALLY INORDINACIES INORDINATION INOSILICATES INQUINATIONS INQUIRATIONS INSALIVATING INSALIVATION INSANITATION INSECTICIDAL INSEMINATING INSEMINATION INSINUATIONS INSPIRATIONS INSPISSATING INSPISSATION INSTIGATIONS INSTILLATION INSULARITIES INSURABILITY INTERDIGITAL INTERRAILING INTERSTITIAL INTIMIDATING INTIMIDATION INTIMIDATORS INTIMIDATORY INTOXICATING INTOXICATION INTOXICATIVE INTRANSITIVE INTRINSICATE INURBANITIES INUSITATIONS INVAGINATING INVAGINATION INVALIDATING INVALIDATION INVALIDITIES INVARIANCIES INVERACITIES INVIGILATING INVIGILATION INVIGILATORS INVIGORATING INVIGORATION INVIGORATIVE INVITATIONAL INVITATORIES IRACUNDITIES IRAIMBILANJA IRIDISATIONS IRIDIZATIONS IRRADIANCIES IRRADIATIONS IRRADICATING IRRIGATIONAL IRRITATINGLY ISOANTIGENIC ISOLATIONISM ISOLATIONIST ITALIANATING ITALIANISING ITALIANIZING ITEMISATIONS ITEMIZATIONS ITINERANCIES ITINERATIONS KERATINISING KERATINIZING KINESIATRICS KINESIPATHIC LACINIATIONS LAICISATIONS LAICIZATIONS LAMINARISING LAMINARIZING LARRIKINISMS LATINISATION LATINIZATION LEGITIMATING LEGITIMATION LEXICALISING LEXICALIZING LIBERALISING LIBERALIZING LICENTIATION LILLIPUTIANS LIMINALITIES LIMITATIONAL LINGUISTICAL LIONISATIONS LIONIZATIONS LIQUIDATIONS LIQUIFACTION LITERALISING LITERALIZING LIXIVIATIONS LOGISTICIANS MAXIMISATION MAXIMIZATION MEDICALISING MEDICALIZING MIGRATIONIST MILITARISING MILITARIZING MILLIONAIRES MILLIONNAIRE MILLIRADIANS MINERALISING MINERALIZING MINIATURISED MINIATURISES MINIATURISTS MINIATURIZED MINIATURIZES MINICABBINGS MINIFICATION MINIMALISTIC MINIMISATION MINIMIZATION MINISTRATION MINISTRATIVE MINORITAIRES MISASSIGNING MISCITATIONS MISDIAGNOSIS MISSIONARIES MISSIONARISE MISSIONARIZE MOBILISATION MOBILIZATION MODIFICATION MULTIVITAMIN MUNICIPALISE MUNICIPALISM MUNICIPALIST MUNICIPALITY MUNICIPALIZE MUSICALISING MUSICALIZING MUSICIANLIER MUSICIANSHIP NARCISSISTIC NAVIGABILITY NAZIFICATION NEGATIVISTIC NEGATIVITIES NIACINAMIDES NICOTINAMIDE NICTITATIONS NIDIFICATING NIDIFICATION NITRANILINES NOBILITATING NOBILITATION NOMINALISING NOMINALISTIC NOMINALIZING NONIMITATIVE NONINITIATES NOTABILITIES NOTIFICATION NULLIFIDIANS NUPTIALITIES OFFICIATIONS OMNIPARITIES OPINIONATING OPINIONATIVE OPTIMALISING OPTIMALIZING OPTIMISATION OPTIMIZATION ORGANICISTIC ORGANICITIES ORIGINALISMS ORIGINALISTS ORIGINATIONS OSSIFICATION OXIDISATIONS OXIDIZATIONS PACIFICATING PACIFICATION PALIFICATION PANIFICATION PARASITISING PARASITIZING PARTIALISING PARTIALIZING PARTITIONING PARTITIONIST PATRIALISING PATRIALIZING PEDIATRICIAN PILGRIMAGING PINNATIFIDLY PINNIPEDIANS PIXILLATIONS PLAGIARISING PLAGIARIZING PLASTICISING PLASTICIZING PLEINAIRISMS PLEINAIRISTS PRECISIANISM PRECISIANIST PRINCIPALITY PRINTABILITY PROPITIATING PROPITIATION PURIFICATION PURITANISING PURITANIZING PYRITHIAMINE QUITCLAIMING RADICALISING RADICALIZING RADIOIODINES RAMIFICATION RATIFICATION REIFICATIONS REINHABITING REINITIATING REINITIATION RELATIVISING RELATIVIZING REVISITATION REVITALISING REVITALIZING SALIFICATION SALINISATION SALINIZATION SANGUINITIES SANITISATION SANITIZATION SATIRISATION SATIRIZATION SATISFICINGS SCIENTIFICAL SCINCOIDIANS SEMEIOTICIAN SEMIFINALIST SEMINALITIES SEMIOTICIANS SHIRTTAILING SIGILLARIANS SIGILLATIONS SIGNIFICANCE SIGNIFICANCY SIGNIFICANTS SIGNIFICATES SIGNIFICATOR SILENTIARIES SILLIMANITES SINISTRALITY SITUATIONISM SMIFLIGATING SOCIALISINGS SOCIALIZINGS SOLICITATION SPANIOLISING SPANIOLIZING SPATIALISING SPATIALIZING SPECIALISING SPECIALIZING SPIFLICATING SPIFLICATION STAINABILITY STATISTICIAN STIGMATISING STIGMATIZING TAILSPINNING TENABILITIES THIORIDAZINE THIOSINAMINE TITILLATIONS TITTIVATIONS TRADITIONIST TRAINABILITY TRANSITIVITY TRICHINIASES TRICHINIASIS TRILLIONAIRE TRINITARIANS TRINOMIALISM TRINOMIALIST TRIPALMITINS TRIPARTITION TRIPLICATING TRIPLICATION TRIPUDIATING TRIPUDIATION TRIVIALISING TRIVIALIZING TUNABILITIES TYPIFICATION UBIQUITARIAN UGLIFICATION UMBILICATION UNAMIABILITY UNARTIFICIAL UNCINARIASIS UNIDEALISTIC UNIFICATIONS UNIONISATION UNIONIZATION UNITARIANISM UNITISATIONS UNITIZATIONS UTILISATIONS UTILITARIANS UTILIZATIONS UTOPIANISING UTOPIANIZING VAGINICOLINE VARIATIONIST VATICINATING VATICINATION VERIFICATION VIGILANTISMS VILIFICATION VILLAINIZING VILLICATIONS VINDEMIATING VINDICATIONS VINIFICATION VINIFICATORS VIRGINALISTS VIRGINALLING VIRILISATION VIRILIZATION VIRTUALISING VIRTUALIZING VISITATIONAL VITALISATION VITALIZATION VITAMINISING VITAMINIZING VITRIFACTION VITRIOLATING VITRIOLATION VIVIFICATION VOLATILISING VOLATILIZING ZILLIONAIRES