There are 1013 twelve-letter words containing A, 2I and 2T, https://www.bestwordlist.com/c/a/5/12letterwordswithaiitt.htm ABIRRITATING ABOLITIONIST ABORTIONISTS ABSINTHIATED ABSOLUTISTIC ABSORPTIVITY ABSTRICTIONS ABSTRUSITIES ACETONITRILE ACTABILITIES ACTINOMETRIC ADAPTABILITY ADAPTIVITIES ADDITIVITIES ADMINISTRANT ADMINISTRATE ADOPTABILITY ADOPTIANISTS ADOPTIONISTS ADSCITITIOUS ADVENTITIOUS AESTHETICIAN AESTHETICISE AESTHETICISM AESTHETICIST AESTHETICIZE AESTIVATIONS AETIOLOGISTS AGENTIVITIES AGRITOURISTS AHISTORICITY AIGUILLETTES AIRTIGHTNESS AIRWORTHIEST ALIMENTATION ALIMENTATIVE ALLITERATING ALLITERATION ALLITERATIVE ALTALTISSIMO ALTERABILITY ALTIMETRICAL ALTITUDINOUS AMITOTICALLY AMORTISATION AMORTIZATION ANABAPTISTIC ANASTIGMATIC ANELASTICITY ANNUNTIATING ANORTHOSITIC ANTAGONISTIC ANTARTHRITIC ANTEPOSITION ANTHELMINTIC ANTIABORTION ANTIADITISES ANTIAIRCRAFT ANTICATHOLIC ANTICIPATING ANTICIPATION ANTICIPATIVE ANTICIPATORS ANTICIPATORY ANTICLOTTING ANTICREATIVE ANTIDIABETIC ANTIDILUTION ANTIDIURETIC ANTIDOGMATIC ANTIELITISMS ANTIELITISTS ANTIENTROPIC ANTIFASCISTS ANTIFEMINIST ANTIFRICTION ANTIGENICITY ANTIHALATION ANTIHUMANIST ANTIHYSTERIC ANTILITERARY ANTILITERATE ANTIMAGNETIC ANTIMILITARY ANTIMITOTICS ANTIMONIATES ANTIMOSQUITO ANTINATIONAL ANTINEPOTISM ANTINEUTRINO ANTINOVELIST ANTIOXIDANTS ANTIPARTICLE ANTIPATHETIC ANTIPATHISTS ANTIPHRASTIC ANTIPOLITICS ANTIPRIESTLY ANTIPRURITIC ANTIPYRETICS ANTIQUATIONS ANTIRACHITIC ANTIRATIONAL ANTIREALISTS ANTIROMANTIC ANTIROYALIST ANTISPASTICS ANTISTATISTS ANTISTROPHIC ANTITHEISTIC ANTITHETICAL ANTITHROMBIN ANTITUSSIVES ANTIVITAMINS APICULTURIST APOSTATISING APOSTATIZING APOSTOLICITY AQUATINTISTS ARBITRATIONS ARCHITECTING ARCTOPHILIST ARISTOCRATIC ARITHMETICAL ARTICULATING ARTICULATION ARTICULATIVE ARTILLERISTS ARTISTICALLY ASTIGMATISMS ASTRICTIVELY ATHLETICISMS ATOMISATIONS ATOMIZATIONS ATTITUDINISE ATTITUDINIZE ATTRIBUTIONS ATTRIBUTIVES AUDIOMETRIST AUDIOTYPISTS AUDITABILITY AUTHENTICITY AUTISTICALLY AUTOCRITIQUE AUTODIDACTIC AUTOIMMUNITY AUTOMATICITY AUTOMATISING AUTOMATIZING AUTOMOBILIST AUTOMOBILITY AUTOTOMISING AUTOTOMIZING AUTOXIDATION AVICULTURIST AVITAMINOTIC BABINGTONITE BABYSITTINGS BACKFITTINGS BAPTISTERIES BESTIALITIES BIMETALLISTS BIOCATALYTIC BIOSATELLITE BIOTURBATION BIPARTITIONS BITONALITIES BITUMINATING BRATTISHINGS BRISTLETAILS CANTILLATING CANTILLATION CAPACITATING CAPACITATION CAPITALISTIC CAPITULATING CAPITULATION CAPTIVATIONS CARICATURIST CARRIWITCHET CARTOPHILIST CASSITERITES CASTIGATIONS CATADIOPTRIC CAUSATIONIST CAUSTICITIES CENTRALISTIC CENTRALITIES CENTURIATION CERTIFICATED CERTIFICATES CHIASTOLITES CHITCHATTING CHREMATISTIC CHROMATICITY CITIFICATION CITYFICATION CLARINETISTS CLARINETTIST COACTIVITIES COALITIONIST COCCIDIOSTAT COGITATINGLY COGITATIVELY COHABITATION COMPATRIOTIC CONDITIONATE CONSTIPATING CONSTIPATION CONTAGIONIST CONTIGNATION CONTINUALITY CONTINUATION CONTINUATIVE CORTICATIONS COUNTABILITY CREATIONISTS CREATIVITIES CREMATIONIST CREPITATIONS CRISTOBALITE CRITICASTERS CRYSTALLITIC CRYSTALLITIS CULTIVATIONS CUTABILITIES CUTINISATION CUTINIZATION DEACTIVATING DEACTIVATION DEBILITATING DEBILITATION DEBILITATIVE DECAPITATING DECAPITATION DEFLATIONIST DELEGITIMATE DELIMITATING DELIMITATION DELIMITATIVE DEMOTIVATING DEMOTIVATION DENITRATIONS DEPOSITATION DEPUTISATION DEPUTIZATION DERMATITIDES DERMATITISES DESTIGMATIZE DESTINATIONS DETONABILITY DETOXICATING DETOXICATION DEVIATIONIST DEXTRALITIES DICTATORSHIP DIETETICALLY DIGITISATION DIGITIZATION DILATABILITY DILATATIONAL DILATOMETRIC DILETTANTISH DILETTANTISM DIPLOMATISTS DISCEPTATION DISINFECTANT DISINFESTANT DISINTEGRATE DISINTRICATE DISMUTATIONS DISORIENTATE DISPUTATIONS DISPUTATIOUS DISSERTATING DISSERTATION DISSERTATIVE DISTILLATION DISTILLATORY DISTORTIONAL DISTRACTIBLE DISTRACTIONS DISTRAINMENT DISTRIBUTARY DISTURBATIVE DITHEISTICAL DITHELETICAL DITHYRAMBIST DITRANSITIVE DITTOGRAPHIC DOCTRINALITY DONATISTICAL DUBITATIVELY EARSPLITTING EDITORIALIST EDUCATIONIST EGURGITATING ELASTICATING ELASTICATION ELASTICITIES ELECTABILITY ELICITATIONS ELUTRIATIONS EMOTIONALIST EMOTIONALITY ENTERTAINING ENTHUSIASTIC EQUATABILITY EQUITABILITY ERGATIVITIES EROTISATIONS EROTIZATIONS ESSENTIALIST ESSENTIALITY ESTERISATION ESTERIZATION ESTHETICIANS ETERNALITIES ETERNISATION ETERNIZATION ETHERISATION ETHERIZATION ETHICALITIES EXCITABILITY EXCOGITATING EXCOGITATION EXCOGITATIVE EXERCITATION EXFILTRATING EXFILTRATION EXHAUSTIVITY EXISTENTIALS EXORBITATING EXPATIATIONS EXPATRIATING EXPATRIATION EXPATRIATISM EXPEDITATING EXPEDITATION EXPLOITATION EXPLOITATIVE EXTIRPATIONS EXTRADITIONS EXTRALIMITAL EXTRANEITIES EXTRICATIONS FACILITATING FACILITATION FACILITATIVE FACILITATORS FACILITATORY FACTIONALIST FACTITIOUSLY FACTUALISTIC FACTUALITIES FANTASTICISM FATIGABILITY FELICITATING FELICITATION FELICITATORS FERTIGATIONS FESTINATIONS FICTIONALITY FILTRABILITY FISSICOSTATE FLAGITATIONS FLOATABILITY FORTEPIANIST FRACTALITIES FRATERNITIES FRONTALITIES FUSTIGATIONS FUTILITARIAN GELATINATING GELATINATION GONIATITOIDS GRATILLITIES GRAVITATIONS GUESTIMATING GURGITATIONS HABILITATING HABILITATION HABILITATORS HABITABILITY HABITATIONAL HABITUATIONS HAIRCUTTINGS HAIRSPLITTER HAIRSTYLISTS HAMARTHRITIS HATCHABILITY HEPATISATION HEPATIZATION HERETICATING HERITABILITY HESITATINGLY HIPPIATRISTS HOSPITALISTS IATROCHEMIST IGNITABILITY ILLEGITIMATE ILLIMITATION ILLITERATELY ILLUSTRATING ILLUSTRATION ILLUSTRATIVE IMMANENTISTS IMMATURITIES IMMUTABILITY IMPARTATIONS IMPARTIALITY IMPASTATIONS IMPETRATIONS IMPLANTATION IMPORTATIONS IMPUTABILITY IMPUTATIVELY INACTIVATING INACTIVATION INACTIVITIES INADAPTATION INARTICULATE INATTENTIONS INCANTATIONS INCAPACITANT INCAPACITATE INCATENATING INCATENATION INCOGITATIVE INCRUSTATION INDENTATIONS INDOCTRINATE INELASTICITY INEXACTITUDE INFATUATIONS INFESTATIONS INFILTRATING INFILTRATION INFILTRATIVE INFILTRATORS INFINITATING INFLATIONIST INFOTAINMENT INGRAFTATION INGRATIATING INGRATIATION INGRATIATORY INGRATITUDES INGURGITATED INGURGITATES INHABITATION INITIATIVELY INITIATORIES INITIATRICES INITIATRIXES INSANITATION INSTALLATION INSTANTIATED INSTANTIATES INSTAURATION INSTIGATIONS INSTILLATION INTEGRATIONS INTENERATING INTENERATION INTENSATIVES INTERACTIONS INTERDIALECT INTERDIGITAL INTERFOLIATE INTERLINEATE INTERMATTING INTERMEDIATE INTERORBITAL INTERPARTIES INTERSPATIAL INTERSTADIAL INTERSTATION INTERSTITIAL INTERSTRAINS INTERTIDALLY INTERTILLAGE INTERTRAFFIC INTERVARSITY INTESTINALLY INTIMATENESS INTIMIDATING INTIMIDATION INTIMIDATORS INTIMIDATORY INTOLERATION INTONATIONAL INTOXICATING INTOXICATION INTOXICATIVE INTOXICATORS INTRANSIGENT INTRANSITIVE INTRAUTERINE INTRAVITALLY INTREATINGLY INTRIGUANTES INTRINSICATE INTURBIDATED INTURBIDATES INUSITATIONS INVESTIGATED INVESTIGATES INVESTIGATOR INVITATIONAL INVITATORIES INVULTUATION IRRITABILITY IRRITATINGLY IRROTATIONAL ISOLATIONIST ITACOLUMITES ITALIANATING ITEMISATIONS ITEMIZATIONS ITINERATIONS JACTITATIONS JUSTIFICATOR KICKSTARTING KINAESTHETIC LATERALITIES LATERISATION LATERIZATION LATINISATION LATINIZATION LATITUDINOUS LECTISTERNIA LEGITIMATELY LEGITIMATING LEGITIMATION LEGITIMATISE LEGITIMATIZE LEGITIMATORS LEVITATIONAL LICENTIATION LIMITATIONAL LITERALISTIC LITERALITIES LITHOLATRIES LITHOTOMICAL MACHTPOLITIK MAGISTRALITY MAILSHOTTING MALNUTRITION MARTINETISMS MASTICATIONS MATERIALISTS MEDITATIVELY MERCANTILIST MERISTEMATIC MERITOCRATIC METAFICTIONS METALISATION METALIZATION METAPOLITICS METASILICATE METEORITICAL METRICATIONS MICROHABITAT MIDLATITUDES MIDLITTORALS MIGRATIONIST MILITANTNESS MILITARISTIC MINIATURISTS MINICASSETTE MINISTRATION MINISTRATIVE MISALLOTTING MISATTRIBUTE MISCITATIONS MISESTIMATED MISESTIMATES MISQUOTATION MITHRIDATISE MITHRIDATISM MITHRIDATIZE MONETISATION MONETIZATION MOTIVATIONAL MOTORISATION MOTORIZATION MOUNTAINIEST MULTICIPITAL MULTIFOLIATE MULTINATIONS MULTIPARTIES MULTIPARTITE MULTIPLICATE MULTISERIATE MULTITASKING MULTIVARIATE MULTIVITAMIN MUSSITATIONS MUTABILITIES MUTAGENICITY MUTATIONISTS NATIONALISTS NATRIURETICS NATURALISTIC NEGATIONISTS NEGATIVISTIC NEGATIVITIES NEGOTIATIONS NEOVITALISTS NEUTRALISTIC NEUTRALITIES NICTITATIONS NIGHTMARIEST NITROGELATIN NITROSATIONS NOBILITATING NOBILITATION NONIMITATIVE NONINITIATES NONIRRITANTS NONMILITANTS NOTABILITIES NOTAPHILISTS NOTARISATION NOTARIZATION NOTIFICATION NOTIONALISTS NUMISMATISTS NUPTIALITIES NUTRITIONARY NYCTINASTIES OBLITERATING OBLITERATION OBLITERATIVE OBSTETRICIAN OBSTIPATIONS OPERATIONIST OPHTHALMITIS OPTIMALITIES OPTIMISATION OPTIMISTICAL OPTIMIZATION ORIENTALISTS ORIENTATIONS OUTSTRAINING OVARIOTOMIST OVERACTIVITY PAEDIATRISTS PALATABILITY PALPITATIONS PANARTHRITIS PANCREATITIS PANTOMIMISTS PARTIALITIES PARTICIPANTS PARTICIPATED PARTICIPATES PARTICIPATOR PARTITIONERS PARTITIONING PARTITIONIST PARTURITIONS PATRIALITIES PATRISTICISM PECTINATIONS PECTISATIONS PECTIZATIONS PENITENTIALS PENITENTIARY PEPTISATIONS PEPTIZATIONS PERICLITATED PERICLITATES PERIPATETICS PERISTALITHS PERISTOMATIC PESTILENTIAL PETRIFACTION PETRIFACTIVE PHILATELISTS PHOTOACTINIC PHYSIATRISTS PICTORIALIST PIGMENTATION PLASTICITIES PLASTICKIEST PLASTINATION PLATITUDINAL PNEUMATICITY POLITICASTER PONTIFICATED PONTIFICATES PONTIFICATOR PORTRAITISTS POSTILLATING POSTILLATION POTABILITIES POTENTIALITY POTENTIARIES POTENTIATING POTENTIATION PRACTICALIST PRACTICALITY PRACTITIONER PRAGMATICIST PRAGMATISTIC PREADMITTING PRECIPITANTS PRECIPITATED PRECIPITATES PRECIPITATOR PRESTIGIATOR PRINTABILITY PROPITIATING PROPITIATION PROPITIATIVE PROPITIATORS PROPITIATORY PROTACTINIUM PSYCHIATRIST PUTANGITANGI QUANTISATION QUANTITATING QUANTITATION QUANTITATIVE QUANTITIVELY QUANTIZATION QUATERNITIES QUIDDITATIVE RADIESTHETIC RATABILITIES RATIFICATION RATIOCINATED RATIOCINATES RATIOCINATOR RATIONALISTS REACTIONISTS REACTIVATING REACTIVATION REACTIVITIES REESTIMATING REESTIMATION REFRACTIVITY REFUTABILITY REGISTRATION REHABILITANT REHABILITATE REINITIATING REINITIATION REINSTATIONS REITERATIONS REITERATIVES RELATABILITY RELATIONISTS RELATIVISTIC RELATIVITIES RELATIVITIST REMOTIVATING REMOTIVATION REPARTITIONS REPATRIATING REPATRIATION REPETITIONAL REPRISTINATE REPUTABILITY RESTATIONING RETALIATIONS RETICULATING RETICULATION RETRACTILITY REVISITATION ROBOTISATION ROBOTIZATION ROMANTICISTS RUSTICATINGS RUSTICATIONS SALTATIONISM SALTATIONIST SALVATIONIST SANITISATION SANITIZATION SATELLITISED SATELLITISES SATELLITIUMS SATELLITIZED SATELLITIZES SATIRISATION SATIRIZATION SATISFACTION SATURABILITY SCINTILLATED SCINTILLATES SCINTILLATOR SCRUTABILITY SECTIONALIST SEMANTICISTS SEMILITERATE SENSATIONIST SEPARATISTIC SESQUITERTIA SHIRTTAILING SHIRTWAISTED SHIRTWAISTER SIDEROSTATIC SIMULTANEITY SIMVASTATINS SINFONIETTAS SINISTRALITY SITUATIONISM SLACKTIVISTS SOLICITATION SOLSTITIALLY SOMATIZATION SOPHISTICATE SPAGHETTINIS SPASTICITIES SPATIALITIES SPIRITUALIST SPIRITUALITY SPORTABILITY STABILISATOR STABILIZATOR STAINABILITY STATIONARIES STATIONARILY STATIONERIES STATISTICIAN STICHOMYTHIA STICKABILITY STIGMATISERS STIGMATISING STIGMATIZERS STIGMATIZING STILLATORIES STIMULATIONS STIMULATIVES STIPENDIATED STIPENDIATES STIPULATIONS STOMATITIDES STOMATITISES STRATEGISING STRATEGIZING STREPITATION STRIDULATING STRIDULATION STROBILATING STROBILATION STRONTIANITE STYLISATIONS STYLIZATIONS SUSCITATIONS SYNDIOTACTIC SYNTACTICIAN TACTUALITIES TAMABILITIES TAMBOURINIST TANTALISINGS TANTALIZINGS TAPSIETEERIE TARGETITISES TAXABILITIES TAXIDERMISTS TEACHABILITY TECHNICALITY TEMPERALITIE TEMPTABILITY TENABILITIES TERMINATIONS TERMITARIUMS TERRITORIALS TESTIFICATES TESTIFICATOR TESTIMONIALS TETANISATION TETANIZATION TETRASTICHIC TEXTUALITIES TEXTUALIZING THEATRICISED THEATRICISES THEATRICISMS THEATRICIZED THEATRICIZES THEISTICALLY THEORETICIAN THEORISATION THEORIZATION THIGMOTACTIC TIMESTAMPING TIMETABLINGS TIMOCRATICAL TINCTORIALLY TINTINNABULA TITANIFEROUS TITILLATIONS TITIPOUNAMUS TITTIVATIONS TITULARITIES TOLERABILITY TOPICALITIES TOSTICATIONS TOTALISATION TOTALITARIAN TOTALIZATION TRACEABILITY TRACHEITIDES TRACHEITISES TRACTABILITY TRACTILITIES TRADITIONARY TRADITIONERS TRADITIONIST TRADUCIANIST TRAFFICKIEST TRAINABILITY TRAITORSHIPS TRALATICIOUS TRALATITIOUS TRAMPOLINIST TRANQUILLITY TRANSITIONAL TRANSITIONED TRANSITIVELY TRANSITIVITY TRANSITORILY TRANSMITTING TRAUMATISING TRAUMATIZING TREATABILITY TREPHINATION TREPIDATIONS TREPIDATIOUS TRIBULATIONS TRICHROMATIC TRICUSPIDATE TRIFOLIOLATE TRIFURCATING TRIFURCATION TRIGRAMMATIC TRINITARIANS TRINOMIALIST TRIPALMITINS TRIPARTITELY TRIPARTITION TRIPINNATELY TRIPLICATING TRIPLICATION TRIPUDIATING TRIPUDIATION TRIRADIATELY TRITAGONISTS TRITHIONATES TRITICALNESS TRITURATIONS TRIUMPHALIST TRIUMVIRATES TRIVIALITIES TRUSTABILITY TUBULARITIES TUNABILITIES TURBINATIONS TWISTABILITY TYMPANITISES TYPICALITIES TYPIFICATION ULTRATINIEST UNARTISTLIKE UNCHASTITIES UNHESITATING UNITISATIONS UNITIZATIONS UNSAINTLIEST UNSTRATIFIED UNTENABILITY UTILISATIONS UTILITARIANS UTILIZATIONS VACATIONISTS VARIATIONIST VASOACTIVITY VATICINATING VATICINATION VATICINATORS VATICINATORY VENDITATIONS VENTILATIONS VERTICILLATE VINAIGRETTES VIRTUALITIES VISITATIONAL VISITATORIAL VITALISATION VITALIZATION VITATIVENESS VITICULTURAL VITILITIGATE VITRAILLISTS VITRIFACTION VITRIFACTURE VITRIOLATING VITRIOLATION VITUPERATING VITUPERATION VITUPERATIVE VOLATILITIES VOLITATIONAL WAINSCOTTING WAISTCOATING WILDCATTINGS WITHSTANDING WITWANTONING