There are 591 twelve-letter words containing A, I, O, T and Y, https://www.bestwordlist.com/c/a/5/12letterwordswithaioty.htm ABBREVIATORY ABOLITIONARY ABSORPTIVITY ABSTEMIOUSLY ACCOMPANYIST ACCRETIONARY ACETYLATIONS ACOUSTICALLY ACROSTICALLY ACTINOMORPHY ACTINOMYCETE ACTINOMYCINS ADDITIONALLY ADJUDICATORY ADMONITORILY ADOPTABILITY AFFRONTINGLY AGROINDUSTRY AHISTORICITY ALCOHOLICITY ALLOANTIBODY ALLOWABILITY AMBLYGONITES AMBULATORILY AMELIORATORY AMITOTICALLY AMPHICTYONIC AMYLOPECTINS AMYOTROPHIES ANALYSATIONS ANALYZATIONS ANATOMICALLY ANISODACTYLS ANNIHILATORY ANNUNCIATORY ANTHOCYANINS ANTICIPATORY ANTICYCLONES ANTICYCLONIC ANTIHYDROGEN ANTIMONOPOLY ANTIPHONALLY ANTIROYALIST ANTISOCIALLY AORISTICALLY APERIODICITY APOCALYPTISM APOCALYPTIST APOCYNTHIONS APODYTERIUMS APOLITICALLY APOPHYLLITES APOSTOLICITY APPOSITIVELY APPRECIATORY AREOSYSTILES AROMATICALLY ARSENOPYRITE ARTICULATORY ARTIODACTYLS ASPHYXIATION ASPHYXIATORS ASSIMILATORY ASTOUNDINGLY ASTROBIOLOGY ASTROPHYSICS ASYMPTOMATIC ASYMPTOTICAL ATHROCYTOSIS ATTORNEYISMS ATTORNEYSHIP AUDIOTYPINGS AUDIOTYPISTS AUTOANTIBODY AUTOECIOUSLY AUTOHYPNOSIS AUTOHYPNOTIC AUTOIMMUNITY AUTOMATICITY AUTOMOBILITY AUTOPTICALLY AYUNTAMIENTO BACTERIOLOGY BINOCULARITY BIOASTRONOMY BIOCATALYSES BIOCATALYSIS BIOCATALYSTS BIOCATALYTIC CACHINNATORY CAESPITOSELY CALAMITOUSLY CALIGINOSITY CALUMNIATORY CANTILLATORY CAPITULATORY CARTOONISHLY CATEGORIALLY CATHODICALLY CATHOLICALLY CATIONICALLY CHALCOPYRITE CHATOYANCIES CHRISTOPHANY CHROMATICITY CITYFICATION CLAIRVOYANTS COGITATINGLY COGITATIVELY COLLEGIALITY COLLEGIATELY COLLINEARITY COLLOIDALITY COLORABILITY COMMENSALITY CONCILIATORY CONCOMITANCY CONCUBITANCY CONFIRMATORY CONFISCATORY CONGENIALITY CONGENITALLY CONNUBIALITY CONSIGNATORY CONSPIRATORY CONTAGIOUSLY CONTINUALITY CONTRACTIBLY CONTRIBUTARY CONVIVIALITY COORDINATELY COPULATIVELY CORPOREALITY CORYBANTISMS COSMETICALLY COUNTABILITY CROSSABILITY CRYPTOGAMIAN CRYPTOGAMIES CRYPTOGAMIST CRYPTOMERIAS CRYPTOMNESIA CRYSTALLOIDS CYANIDATIONS CYANOGENETIC CYBERNATIONS CYCLISATIONS CYCLIZATIONS CYCLOPAEDIST CYCLOTHYMIAC CYCLOTHYMIAS CYTOCHALASIN CYTOCHEMICAL DACTYLIOLOGY DECORATIVELY DEFAMATORILY DEFLATIONARY DEHYDRATIONS DENOTATIVELY DENUNCIATORY DEPRECIATORY DEROGATIVELY DEROGATORILY DESOLATINGLY DESPOTICALLY DETONABILITY DEVOTIONALLY DIALECTOLOGY DIALYSATIONS DIALYZATIONS DIATONICALLY DICHOTICALLY DICTYOPTERAN DIOPTRICALLY DISASTROUSLY DISCORDANTLY DISLOCATEDLY DISLOYALTIES DISPENSATORY DISSOCIALITY DISTILLATORY DOCTRINALITY DOGMATICALLY DOMESTICALLY DOMINATINGLY DYNAMOMETRIC ECOTYPICALLY EGOISTICALLY ELECTORIALLY ELOCUTIONARY EMANCIPATORY EMOTIONALITY ENANTIOPATHY ENANTIOSTYLY ENANTIOTROPY ENCYSTATIONS ENHYPOSTASIA ENHYPOSTATIC ENTROPICALLY ENZOOTICALLY EPISTOLATORY EQUATIONALLY EQUATORIALLY EQUIVOCALITY EQUIVOCATORY ERYTHROPENIA ERYTHROPSIAS ESOTERICALLY ETYMOLOGICAL EVOLUTIONARY EXHILARATORY EXORBITANTLY EXOTERICALLY EXTORTIONARY FACILITATORY FACTITIOUSLY FASTIDIOUSLY FAVORABILITY FICTIONALITY FLAGITIOUSLY FLOATABILITY FORESTAYSAIL FORGEABILITY FRACTIONALLY FRICTIONALLY FUNCTIONALLY GAMETOPHYTIC GELATINOUSLY GEODETICALLY GIGANTOMACHY GRANULOCYTIC GRATUITOUSLY GYMNATORIUMS GYNECOCRATIC GYNECOMASTIA GYNIOLATRIES GYROMAGNETIC HAEMATOLYSIS HAEMATOXYLIC HAEMATOXYLIN HALOPHYTISMS HAMARTIOLOGY HELIOTHERAPY HEMATOXYLINS HEPATICOLOGY HISTORICALLY HOLISTICALLY HOMEOTYPICAL HOMOPOLARITY HOMOTAXIALLY HONORABILITY HORIZONTALLY HYDATIDIFORM HYDROELASTIC HYDROPATHICS HYDROPATHIES HYDROPATHIST HYDROSTATICS HYETOGRAPHIC HYGROCHASTIC HYLOPATHISMS HYLOPATHISTS HYPERACTIONS HYPHENATIONS HYPNOTICALLY HYPNOTISABLE HYPNOTIZABLE HYPOCRITICAL HYPOGASTRIUM HYPOGNATHISM HYPONATREMIA HYPONATREMIC HYPOPLASTIES HYPOSTASISED HYPOSTASISES HYPOSTASIZED HYPOSTASIZES HYPOSTATICAL HYPOSTATISED HYPOSTATISES HYPOSTATIZED HYPOSTATIZES HYPOSTHENIAS HYPOTHALAMIC HYPOTHERMIAS HYPOTHETICAL HYPOXANTHINE HYSTEROMANIA ICHTHYOCOLLA ICHTHYOFAUNA ICHTHYOLATRY ICHTHYOPHAGY ICHTHYOSAURI ICHTHYOSAURS IDEATIONALLY IDOLATROUSLY ILLOGICALITY ILLUSTRATORY IMMODERATELY IMMOVABILITY INAPPOSITELY INAUGURATORY INCAUTIOUSLY INCHOATIVELY INCOMMUTABLY INCOMPATIBLY INCOMPUTABLY INCONSTANTLY INCRETIONARY INFLAMMATORY INFLATIONARY INGRATIATORY INHOSPITABLY INNOVATIVELY INORDINATELY INSOUCIANTLY INTERCOMPANY INTERLOCALLY INTIMIDATORY INTOLERANTLY INTRACOMPANY IRRATIONALLY ISOENZYMATIC ISOTHERMALLY ISOTONICALLY ISOTOPICALLY KAKISTOCRACY KARYOKINETIC KARYOLOGISTS KARYOTYPICAL KEYBOARDISTS KYANISATIONS KYANIZATIONS LACHRYMATION LACHRYMOSITY LOCATIONALLY LOGISTICALLY LOGNORMALITY LYCANTHROPIC LYMPHOMATOID MACROCYTOSIS MANIPULATORY MARTYROLOGIC MATRILOCALLY MEMORABILITY METEORICALLY METHODICALLY METHYLATIONS MICROANALYST MICROANATOMY MICROCRYSTAL MICROGRAVITY MICROPAYMENT MICROTONALLY MINATORIALLY MODIFICATORY MODULABILITY MOLECULARITY MONASTICALLY MONISTICALLY MONITORIALLY MONOSYNAPTIC MOULDABILITY MUTATIONALLY MYCOBACTERIA MYCODOMATIUM MYCOPHAGISTS MYELOBLASTIC MYELOPATHIES MYOFILAMENTS MYOGRAPHISTS MYSTAGOGICAL MYTHOLOGIANS MYTHOLOGICAL MYTHOMANIACS NARCOTICALLY NEMATOCYSTIC NEOTERICALLY NEUROTICALLY NEUROTYPICAL NOCTURNALITY NOEMATICALLY NOMINATIVELY NONANALYTICS NONARBITRARY NONENZYMATIC NONGENITALLY NONLINEARITY NONMIGRATORY NONSPATIALLY NUTRITIONARY NYCTOPHOBIAS OBEDIENTIARY OBLIGATORILY OCCIDENTALLY OCTOSYLLABIC OPERATICALLY OPINIONATELY OPPOSABILITY ORATORICALLY ORBICULARITY ORGASTICALLY ORNITHOMANCY OSTEICHTHYAN OUTCRAFTYING OUTLANDISHLY OVERACTIVITY OVERCAPACITY OVERLITERARY OVERMATURITY OXYGENATIONS PACIFICATORY PALYNOLOGIST PANCYTOPENIA PANOPTICALLY PANTISOCRACY PAPYROLOGIST PARALYSATION PARALYZATION PARASITOLOGY PARASYMBIONT PARATHYROIDS PARATYPHOIDS PAROCHIALITY PASSIONATELY PATHOBIOLOGY PATRILOCALLY PEJORATIVELY PERINATOLOGY PERITONEALLY PERSPIRATORY PHAENOTYPING PHAGOCYTICAL PHAGOCYTISED PHAGOCYTISES PHAGOCYTISMS PHAGOCYTIZED PHAGOCYTIZES PHAGOCYTOSIS PHAGOCYTOTIC PHENOTYPICAL PHILANTHROPY PHONETICALLY PHONOTYPICAL PHOSPHATIDYL PHOTODYNAMIC PHYCOXANTHIN PHYLLOTACTIC PHYLLOTAXIES PHYSIOCRATIC PHYSIOLATERS PHYTOALEXINS PHYTOGRAPHIC PHYTOLOGICAL PHYTONADIONE PHYTOPHAGIES PICTORICALLY PINEALECTOMY PLASTOCYANIN PLATINOTYPES PLATONICALLY POLYAMORISTS POLYCYTHEMIA POLYGRAPHIST POLYMASTISMS POLYSYNAPTIC POLYTONALISM POLYTONALIST POLYTONALITY PONTIFICALLY POSITIONALLY POSTLIMINARY POSTSYNAPTIC POTENTIALITY PRAISEWORTHY PROBATIONARY PROCTORIALLY PROFLIGATELY PROPHYLACTIC PROPITIATORY PROSTACYCLIN PROTOTYPICAL PROVEABILITY PSAMMOPHYTIC PSILANTHROPY PSYCHOACTIVE PSYCHOPATHIC PUNDITOCRACY PURIFICATORY PYRITOHEDRAL PYROCATECHIN PYROCLASTICS PYROMAGNETIC PYROMETRICAL PYROTARTARIC QUAESTIONARY QUESTIONABLY QUIXOTICALLY RADIOTHERAPY REFLATIONARY REFRACTORILY REHYDRATIONS RELATIONALLY REMOVABILITY RENUNCIATORY REVOCABILITY REVOKABILITY RHETORICALLY RHYTHMOPOEIA ROMANTICALLY SALUTATORILY SAPROPHYTISM SATISFACTORY SCHIZOTHYMIA SCYPHISTOMAE SCYPHISTOMAS SECRETIONARY SEIGNIORALTY SEMIOTICALLY SENATORIALLY SHOCKABILITY SOLSTITIALLY SOMATOTYPING SOOTHSAYINGS SPASMOLYTICS SPORTABILITY STATIONARILY STAYCATIONER STEATOPYGIAS STEREOACUITY STICHOMYTHIA STRIDULATORY STYLISATIONS STYLIZATIONS STYLOGRAPHIC SUBNORMALITY SUBOPTIMALLY SUPPLICATORY SYCOPHANTISE SYCOPHANTISH SYCOPHANTISM SYCOPHANTIZE SYMPTOMATISE SYMPTOMATIZE SYNARTHROSIS SYNCOPATIONS SYNDICATIONS SYNDIOTACTIC SYNOPTICALLY SYNTONICALLY TECTONICALLY TENDINOPATHY THALLOPHYTIC THINGAMYBOBS THIOCYANATES THORACICALLY TINCTORIALLY TOLERABILITY TORRENTIALLY TRADITIONARY TRAITOROUSLY TRANSITORILY TRANSMOGRIFY TRICHOGYNIAL TRIDACTYLOUS TROCHAICALLY TROCHOIDALLY TRYPANOCIDAL TRYPANOCIDES TRYPANOSOMIC TYPIFICATION TYPOGRAPHIES TYPOGRAPHING TYPOGRAPHIST UNEROTICALLY UNNOTICEABLY UNPOETICALLY UNPOPULARITY UNPROFITABLY VAPORABILITY VASOACTIVITY VASODILATORY VATICINATORY VERIFICATORY VITUPERATORY VOCATIONALLY VOLITIONALLY VOLUNTARYISM VOLUNTARYIST ZOOTOMICALLY ZYGODACTYLIC