There are 574 twelve-letter words containing A, P, T and Y, https://www.bestwordlist.com/c/a/4/12letterwordswithapty.htm ABSORPTIVITY ACCOMPANYIST ACTINOMORPHY ADAPTABILITY ADOPTABILITY AMPHICTYONIC AMPHISTYLARS AMYLOPECTINS AMYOTROPHIES ANAGLYPTICAL ANAPHYLACTIC ANAPTYCTICAL ANTHROPOGENY ANTHROPOGONY ANTHROPOLOGY ANTHROPOTOMY ANTICIPATORY ANTIEPILEPSY ANTIMONOPOLY ANTIPHONALLY ANTIPRIESTLY ANTIPYRETICS APERIODICITY APOCALYPTISM APOCALYPTIST APOCYNTHIONS APODYTERIUMS APOLITICALLY APOPHYLLITES APOSTOLICITY APPENDECTOMY APPETISINGLY APPETIZINGLY APPOSITIVELY APPRECIATORY ARCHETYPALLY ARCHETYPICAL AROMATHERAPY ARSENOPYRITE ARTHROGRAPHY ARTHROPLASTY ASPHYXIATING ASPHYXIATION ASPHYXIATORS ASSUMPTIVELY ASTROPHYSICS ASYMPTOMATIC ASYMPTOTICAL ATTORNEYSHIP AUDIOTYPINGS AUDIOTYPISTS AUTOHYPNOSES AUTOHYPNOSIS AUTOHYPNOTIC AUTOPTICALLY BATHYGRAPHIC BATHYPELAGIC BATHYSCAPHES BATHYSPHERES BIPARENTALLY BRADYPEPTICS CAESPITOSELY CALYPTROGENS CAPACITIVELY CAPITULATORY CATAPHYLLARY CATAPHYSICAL CEPHALOMETRY CHALCOPYRITE CHAMAEPHYTES CHARTERPARTY CHARTOGRAPHY CHEMOTHERAPY CHRISTOPHANY CLAPTRAPPERY COMETOGRAPHY COMPENSATORY COMPLACENTLY COMPULSATORY COMPURGATORY CONCEPTUALLY CONSPIRATORY CONTEMPORARY COPULATIVELY CORPOREALITY COUNTERPARTY COUNTERPLAYS CRYMOTHERAPY CRYOPLANKTON CRYPTANALYST CRYPTARITHMS CRYPTOCOCCAL CRYPTOGAMIAN CRYPTOGAMIES CRYPTOGAMIST CRYPTOGAMOUS CRYPTOGRAPHS CRYPTOGRAPHY CRYPTOMERIAS CRYPTOMNESIA CURIETHERAPY CYCADOPHYTES CYCLOPAEDIST CYCLOPENTANE DACTYLOSCOPY DEPRECIATORY DERMATOPHYTE DESPOTICALLY DESPOTOCRACY DICTYOPTERAN DIOPTRICALLY DISCREPANTLY DISPENSATORY DISREPUTABLY DISSIPATEDLY DRAPEABILITY ECLIPTICALLY ECOTYPICALLY ECTYPOGRAPHY ELLIPTICALLY EMANCIPATORY EMPATHICALLY EMPHATICALLY EMPYREUMATIC ENANTIOPATHY ENANTIOTROPY ENHYPOSTASIA ENHYPOSTATIC ENTROPICALLY EPHEMERALITY EPISTOLATORY ERYTHROPENIA ERYTHROPSIAS EUCALYPTOLES EUCALYPTUSES EXPROBRATORY EXTEMPORALLY FOREPAYMENTS FRACTOGRAPHY GAMETOPHYTES GAMETOPHYTIC GASTROPLASTY GLYPTOGRAPHY GLYPTOTHECAE HALOPHYTISMS HELIOTHERAPY HEPATICOLOGY HEPATOMEGALY HETEROGRAPHY HETEROPLASTY HOMEOTYPICAL HOMOPOLARITY HYDNOCARPATE HYDROPATHICS HYDROPATHIES HYDROPATHIST HYDROTHERAPY HYETOGRAPHIC HYLOPATHISMS HYLOPATHISTS HYMENOPLASTY HYMENOPTERAN HYPAESTHESIA HYPAESTHESIC HYPERACIDITY HYPERACTIONS HYPERACTIVES HYPERDACTYLY HYPERMARKETS HYPERMUTABLE HYPERPLASTIC HYPERREACTOR HYPERREALIST HYPERREALITY HYPERSPATIAL HYPERSTHENIA HYPERTEXTUAL HYPERTHERMAL HYPERTHERMIA HYPERTHYMIAS HYPERTYPICAL HYPESTHESIAS HYPHENATIONS HYPNOTHERAPY HYPNOTICALLY HYPNOTISABLE HYPNOTIZABLE HYPOCRITICAL HYPOGASTRIUM HYPOGNATHISM HYPOGNATHOUS HYPONATREMIA HYPONATREMIC HYPOPLASTIES HYPOPLASTRON HYPOSTASISED HYPOSTASISES HYPOSTASIZED HYPOSTASIZES HYPOSTATICAL HYPOSTATISED HYPOSTATISES HYPOSTATIZED HYPOSTATIZES HYPOSTHENIAS HYPOSULPHATE HYPOTHALAMIC HYPOTHALAMUS HYPOTHECATED HYPOTHECATES HYPOTHECATOR HYPOTHERMIAS HYPOTHETICAL HYPOXANTHINE ICHTHYOPHAGY IMPARTIALITY IMPENETRABLY IMPERATIVELY IMPUTABILITY IMPUTATIVELY INAPPARENTLY INAPPOSITELY INCAPABILITY INCOMPATIBLY INCOMPUTABLY INDISPUTABLY INEXPECTANCY INHOSPITABLY INTERCOMPANY INTERPLAYING INTRACOMPANY INTRAPSYCHIC ISOTOPICALLY ITHYPHALLICS KARYOTYPICAL KERATOPHYRES KERATOPLASTY LEPTODACTYLS LYCANTHROPES LYCANTHROPIC LYMPHANGITIC LYMPHANGITIS LYMPHOBLASTS LYMPHOMATOID LYMPHOMATOUS MANIPULATORY MASSOTHERAPY MEPHITICALLY METAPHYSICAL METAPSYCHICS MICROPAYMENT MONOSYNAPTIC MORPHOSYNTAX MULTIPLAYERS MUNICIPALITY MYCOPHAGISTS MYCOPLASMATA MYELOPATHIES MYOGRAPHISTS MYTHOGRAPHER NEUROTYPICAL NONSPATIALLY NYCTOPHOBIAS ODONTOGRAPHY OPALESCENTLY OPERATICALLY OPINIONATELY OPPOSABILITY ORTHOCEPHALY OVERCAPACITY OVERPAYMENTS PACIFICATORY PALAEOBOTANY PALATABILITY PALEONTOLOGY PALLIATIVELY PALYNOLOGIST PANCYTOPENIA PANICULATELY PANOPTICALLY PANPSYCHISTS PANSEXUALITY PANTALOONERY PANTISOCRACY PAPYROLOGIST PARALYSATION PARALYZATION PARAMILITARY PARASITOLOGY PARASYMBIONT PARASYNAPTIC PARASYNTHETA PARATHYROIDS PARATYPHOIDS PARENCHYMATA PARENTERALLY PAROCHIALITY PARTICULARLY PASSIONATELY PATELLECTOMY PATHETICALLY PATHOBIOLOGY PATRILOCALLY PEDANTICALLY PEDANTOCRACY PEJORATIVELY PENITENTIARY PENTADACTYLE PENTADACTYLS PENTADACTYLY PENTAGONALLY PENTAHYDRATE PENTAVALENCY PERCEPTUALLY PERENNIALITY PERFORMATORY PERINATOLOGY PERITONEALLY PERMEABILITY PERPETUALITY PERSPICACITY PERSPIRATORY PERTURBATORY PHAENOTYPING PHAGOCYTICAL PHAGOCYTISED PHAGOCYTISES PHAGOCYTISMS PHAGOCYTIZED PHAGOCYTIZES PHAGOCYTOSED PHAGOCYTOSES PHAGOCYTOSIS PHAGOCYTOTIC PHANEROPHYTE PHANTASMALLY PHARYNGOTOMY PHENOTYPICAL PHILANTHROPY PHONETICALLY PHONOTYPICAL PHOSPHATIDYL PHOTODYNAMIC PHOTOLYSABLE PHOTOLYZABLE PHOTOTHERAPY PHREATOPHYTE PHYCOXANTHIN PHYLACTERIES PHYLETICALLY PHYLLOTACTIC PHYLLOTAXIES PHYSIATRICAL PHYSIATRISTS PHYSICALISTS PHYSIOCRATIC PHYSIOLATERS PHYTOALEXINS PHYTOGRAPHER PHYTOGRAPHIC PHYTOLOGICAL PHYTONADIONE PHYTOPHAGIES PHYTOPHAGOUS PHYTOPLASMAS PHYTOTHERAPY PICTORICALLY PINEALECTOMY PINNATIFIDLY PLACENTOLOGY PLASTOCYANIN PLATELAYINGS PLATINOTYPES PLATONICALLY PLATYRRHINES PLAUSIBILITY PLAYWRITINGS PLEBISCITARY PNEUMATICITY PNEUMATOLOGY POLYAMORISTS POLYANTHUSES POLYCHAETOUS POLYCRYSTALS POLYCYTHEMIA POLYGONATUMS POLYGRAPHIST POLYMASTISMS POLYNUCLEATE POLYPETALOUS POLYSORBATES POLYSYNAPTIC POLYTONALISM POLYTONALIST POLYTONALITY POLYURETHANE POLYURETHANS PONTIFICALLY POSITIONALLY POSTCORONARY POSTLIMINARY POSTSYNAPTIC POSTVAGOTOMY POTENTIALITY PRACTICALITY PRAISEWORTHY PRECIPITANCY PREGNABILITY PRELATICALLY PREMARITALLY PREOVULATORY PRESBYTERATE PRESBYTERIAL PRESBYTERIAN PRESENTIALLY PRESERVATORY PRINCIPALITY PRINTABILITY PROBATIONARY PROCLAMATORY PROCTORIALLY PROFLIGATELY PROPHYLACTIC PROPITIATORY PROSTACYCLIN PROTEOGLYCAN PROTHONOTARY PROTOMARTYRS PROTOTYPICAL PROTRACTEDLY PROTUBERANCY PROVEABILITY PRUDENTIALLY PSAMMOPHYTES PSAMMOPHYTIC PSEUDOMARTYR PSILANTHROPY PSYCHIATRIES PSYCHIATRIST PSYCHOACTIVE PSYCHOPATHIC PTERODACTYLE PTERODACTYLS PTYALAGOGUES PUNDITOCRACY PUPILABILITY PURIFICATORY PURISTICALLY PYRANOMETERS PYRARGYRITES PYRITHIAMINE PYRITOHEDRAL PYROCATECHIN PYROCATECHOL PYROCLASTICS PYROGALLATES PYROMAGNETIC PYROMETRICAL PYROSULPHATE PYROTARTARIC PYROTARTRATE RADIOTHERAPY RECUPERATORY REPARABILITY REPUTABILITY REPUTATIVELY RHYTHMOPOEIA SAPIENTIALLY SAPROPHYTISM SCINTIGRAPHY SCISSIPARITY SCRIPTURALLY SCULPTURALLY SCYPHISTOMAE SCYPHISTOMAS SEPARABILITY SEPARATIVELY SEPTENNIALLY SEPTICIDALLY SEPTUAGENARY SOMATOTYPING SPASMOLYTICS SPERMAPHYTES SPERMAPHYTIC SPERMATOCYTE SPERMATOGENY SPHERICALITY SPIRITUALITY SPORTABILITY STAPEDECTOMY STAPHYLINIDS STAPHYLOMATA STEATOPYGIAS STEATOPYGOUS STEREOGRAPHY STRATIGRAPHY STYLOGRAPHIC SUBOPTIMALLY SUBSPECIALTY SUPERABILITY SUPERGRAVITY SUPERQUALITY SUPPLICATORY SUPRAVITALLY SYCOPHANTISE SYCOPHANTISH SYCOPHANTISM SYCOPHANTIZE SYMPATHETICS SYMPATHISERS SYMPATHISING SYMPATHIZERS SYMPATHIZING SYMPTOMATISE SYMPTOMATIZE SYNADELPHITE SYNAPTICALLY SYNAPTOSOMAL SYNAPTOSOMES SYNCOPATIONS SYNOPTICALLY SYNTHESPIANS TACHYGRAPHER TACHYGRAPHIC TACHYPHASIAS TACHYPHRASIA TECHNOGRAPHY TEMPTABILITY TENDINOPATHY TENDONOPATHY TETRAPYRROLE THALLOPHYTES THALLOPHYTIC THERMOGRAPHY TRACHEOPHYTE TRACHEOSCOPY TRACHYPTERUS TRANSPARENCY TRIGLYPHICAL TRIPARTITELY TRIPINNATELY TRIUMPHANTLY TRYPAFLAVINE TRYPANOCIDAL TRYPANOCIDES TRYPANOSOMAL TRYPANOSOMES TRYPANOSOMIC TRYPARSAMIDE TRYPTOPHANES TYMPANITESES TYMPANITISES TYPECASTINGS TYPICALITIES TYPIFICATION TYPOGRAPHERS TYPOGRAPHIES TYPOGRAPHING TYPOGRAPHIST UNACCEPTABLY UNDERPAYMENT UNDISPUTABLY UNHYPHENATED UNPLEASANTLY UNPLEASANTRY UNPOETICALLY UNPOPULARITY UNPROFITABLY UNREPEATABLY UNSYMPATHIES VAPORABILITY VITUPERATORY XANTHOPHYLLS ZOOPATHOLOGY