There are 414 fourteen-letter words containing A, G, P and T, https://www.bestwordlist.com/c/a/4/14letterwordswithagpt.htm ACUPUNCTURINGS ANTHROPOGENIES ANTHROPOGONIES ANTHROPOGRAPHY ANTHROPOLOGIES ANTHROPOLOGIST ANTHROPOPHAGIC ANTHROPOPHAGUS ANTIPHLOGISTIC APOGEOTROPISMS APOLOGETICALLY APOPHLEGMATICS APOPHTHEGMATIC APOSTROPHISING APOSTROPHIZING APOTHEGMATICAL APOTHEGMATISED APOTHEGMATISES APOTHEGMATISTS APOTHEGMATIZED APOTHEGMATIZES APPROXIMEETING ARTERIOGRAPHIC ARTHROGRAPHIES AUTOBIOGRAPHER AUTOBIOGRAPHIC AUTOCOPROPHAGY AUTORADIOGRAPH AUTOTYPOGRAPHY BACTERIOPHAGES BACTERIOPHAGIC BATHYGRAPHICAL BIBLIOPHAGISTS CALLIGRAPHISTS CAMPANOLOGISTS CARPETBAGGINGS CARTOGRAPHICAL CATHODOGRAPHER CENTUPLICATING CHALCOGRAPHIST CHARTOGRAPHERS CHARTOGRAPHIES CHIROGRAPHISTS CHROMATOGRAPHS CHROMATOGRAPHY CINEMATOGRAPHS CINEMATOGRAPHY COMETOGRAPHIES COMPAGINATIONS COMPARTMENTING COMPURGATORIAL CONCORPORATING COSMOGRAPHISTS COTRANSPORTING COUNTERPLAYING CRYPTOGRAPHERS CRYPTOGRAPHIES CRYPTOGRAPHIST CYTOPATHOGENIC DACTYLIOGRAPHY DACTYLOGRAPHER DACTYLOGRAPHIC DAGUERREOTYPED DAGUERREOTYPER DAGUERREOTYPES DECAPITALISING DECAPITALIZING DECOMPENSATING DEPHLEGMATIONS DEPIGMENTATION DEPRECIATINGLY DERMATOGLYPHIC DERMATOGRAPHIA DERMATOGRAPHIC DESULPHURATING DIAGEOTROPISMS DISCORPORATING DISPARAGEMENTS DISPLEASANTING DISPROPRIATING DRAUGHTPROOFED DRAUGHTSPERSON ECTYPOGRAPHIES ELECTROGRAPHIC ELECTROPLATING ENCEPHALITOGEN ENIGMATOGRAPHY EPEXEGETICALLY EPIGENETICALLY EPIGRAMMATICAL EPIGRAMMATISED EPIGRAMMATISER EPIGRAMMATISES EPIGRAMMATISMS EPIGRAMMATISTS EPIGRAMMATIZED EPIGRAMMATIZER EPIGRAMMATIZES EPISTOLOGRAPHY ERGASTOPLASMIC ETHNOGRAPHICAL EXASPERATINGLY FRACTOGRAPHIES GALACTOPHOROUS GALACTOPOIESES GALACTOPOIESIS GALACTOPOIETIC GALEOPITHECINE GALEOPITHECOID GALVANOPLASTIC GALVANOTROPISM GASTROPLASTIES GASTROSCOPISTS GENTLEMANSHIPS GEOPOLITICALLY GEOPOLITICIANS GERONTOPHILIAS GERONTOPHOBIAS GLADIATORSHIPS GLYPTOGRAPHERS GLYPTOGRAPHIES GONADOTROPHINS GRANTSMANSHIPS GRAPHITISATION GRAPHITIZATION HAEMATOPHAGOUS HAGIOGRAPHISTS HAIRSPLITTINGS HEPATICOLOGIES HEPATICOLOGIST HEPATOMEGALIES HERPETOLOGICAL HETEROGRAPHIES HISTOPATHOLOGY HISTORIOGRAPHY HYETOGRAPHICAL ICHTHYOPHAGIES ICHTHYOPHAGIST ICHTHYOPHAGOUS IMPARIDIGITATE IMPIGNORATIONS IMPOSTHUMATING IMPREGNABILITY INCAPACITATING INTERCOMPARING INTEROPERATING INTERPELLATING INTERPRETATING KINEMATOGRAPHS KINEMATOGRAPHY LARYNGOSCOPIST LEGISLATORSHIP LETTERSPACINGS LEXICOGRAPHIST LIPOGRAMMATISM LIPOGRAMMATIST LITHOGRAPHICAL LYMPHANGIOMATA LYMPHANGITIDES LYMPHANGITISES MAGISTRATESHIP MAGNETOSPHERES MAGNETOSPHERIC MALIMPRINTINGS MASTIGOPHORANS MASTIGOPHOROUS MEGALOPOLITANS METACOMPUTINGS METALLOGRAPHER METALLOGRAPHIC METAMORPHOSING METAPSYCHOLOGY METEOROGRAPHIC MICROPEGMATITE MISPUNCTUATING MOUSETRAPPINGS NEUROPATHOLOGY OBSTREPERATING ODONTOGRAPHIES OESOPHAGITISES ONYCHOPHAGISTS OPHTHALMOLOGIC OPISTHOGLOSSAL OPISTHOGRAPHIC OPPIGNERATIONS OPPIGNORATIONS ORGANOGRAPHIST ORTHOGRAPHICAL ORTHOGRAPHISTS OVERPOPULATING PAGANISTICALLY PALAEBIOLOGIST PALAEETHNOLOGY PALAEOGRAPHIST PALAEOMAGNETIC PALEOBIOLOGIST PALEOECOLOGIST PALEOMAGNETISM PALEOMAGNETIST PALEONTOLOGIES PALEONTOLOGIST PALEOPATHOLOGY PALEOZOOLOGIST PALINGENESISTS PALINGENETICAL PAMPHLETEERING PANGENETICALLY PANGRAMMATISTS PANTHEOLOGISTS PANTOGRAPHICAL PANTOPRAGMATIC PARADIGMATICAL PARAGRAMMATIST PARALINGUISTIC PARAMAGNETISMS PARAMETERISING PARAMETERIZING PARASITOLOGIES PARASITOLOGIST PARCHMENTISING PARCHMENTIZING PARENTHESISING PARENTHESIZING PARLIAMENTINGS PARTRIDGEBERRY PATHOBIOLOGIES PATHOLOGICALLY PEPTIDOGLYCANS PEREGRINATIONS PERINATOLOGIES PERINATOLOGIST PETROGRAPHICAL PETROLOGICALLY PHANTASMAGORIA PHANTASMAGORIC PHARMACOLOGIST PHARYNGOLOGIST PHARYNGOTOMIES PHLEGMATICALLY PHLEGMATICNESS PHLOGISTICATED PHLOGISTICATES PHONAUTOGRAPHS PHONOGRAPHISTS PHOTOENGRAVERS PHOTOENGRAVING PHOTOGENICALLY PHOTOGRAMMETRY PHOTOGRAPHICAL PHOTOGRAPHISTS PHOTOTELEGRAMS PHOTOTELEGRAPH PHRASEOLOGISTS PHYTOGENETICAL PHYTOGEOGRAPHY PHYTOLOGICALLY PHYTOPATHOGENS PHYTOPATHOLOGY PICTORIALISING PICTORIALIZING PIDGINISATIONS PIDGINIZATIONS PIEZOMAGNETISM PLACENTOLOGIES PLAGIOTROPISMS PLANETOLOGICAL PLANETOLOGISTS PLAYWRIGHTINGS PLECTOGNATHOUS PLETHYSMOGRAMS PLETHYSMOGRAPH PNEUMATOLOGIES PNEUMATOLOGIST PNEUMOGASTRICS POLITICALISING POLITICALIZING POSTCOLLEGIATE POSTGANGLIONIC POSTGRADUATION POSTSURGICALLY PRAGMATICALITY PRAGMATISATION PRAGMATIZATION PREACQUAINTING PREARRANGEMENT PREAUTHORIZING PRECONTRACTING PREDESIGNATING PREDESIGNATION PREDESIGNATORY PREDESTINATING PREFABRICATING PREFIGURATIONS PREFORMULATING PREGNABILITIES PRENEGOTIATING PRENEGOTIATION PREPONDERATING PRESANCTIFYING PRIMATOLOGICAL PRIMATOLOGISTS PROBLEMATIZING PROGESTATIONAL PROGNOSTICATED PROGNOSTICATES PROGNOSTICATOR PROPAGANDISTIC PROSTAGLANDINS PROTOLANGUAGES PSEUDOPREGNANT PTERIDOLOGICAL PTERYLOGRAPHIC PUGILISTICALLY PYRAMIDOLOGIST PYROMETALLURGY PYROPHOTOGRAPH RADIOAUTOGRAPH RADIOTELEGRAPH REAPPORTIONING RECAPITALISING RECAPITALIZING RECAPITULATING REFLECTOGRAPHS REFLECTOGRAPHY REGISTRARSHIPS REPARTITIONING REPHOTOGRAPHED REPRISTINATING ROENTGENOGRAPH ROENTGENOPAQUE RONTGENOGRAPHS RONTGENOGRAPHY SAUROPTERYGIAN SCINTIGRAPHIES SELENOGRAPHIST SEPTUAGENARIAN SEPTUAGENARIES SEXTUPLICATING SHAPESHIFTINGS SHARPSHOOTINGS SOPHISTICATING SPAGHETTIFYING SPECTROGRAPHIC SPECTROLOGICAL SPELAEOLOGISTS SPERMATOGENIES SPERMATOGENOUS SPERMATOGONIAL SPERMATOGONIUM SPHAGNOLOGISTS SPIRITUALISING SPIRITUALIZING SPONGIOBLASTIC STEEPLECHASING STEGANOGRAPHER STEGANOGRAPHIC STEGOCEPHALIAN STEGOCEPHALOUS STENOGRAPHICAL STENOGRAPHISTS STEPPARENTINGS STEREOGRAPHIES STEREOGRAPHING STIGMATOPHILIA STRATIGRAPHERS STRATIGRAPHIES STRATIGRAPHIST STYLOGRAPHICAL SUPERANNUATING SUPERDELEGATES SUPERELEVATING SUPEREROGATING SUPEREROGATION SUPEREROGATIVE SUPEREROGATORS SUPEREROGATORY SUPERGRAVITIES SUPEROVULATING SUPPLICATINGLY SUPRASEGMENTAL SURROGATESHIPS SYCOPHANTISING SYCOPHANTIZING SYMPTOMATISING SYMPTOMATIZING SYMPTOMATOLOGY TACHYGRAPHICAL TACHYGRAPHISTS TECHNOGRAPHIES TELAUTOGRAPHIC TELEPHOTOGRAPH TETRASPORANGIA THALASSOGRAPHY THAUMATOGRAPHY THERMOGRAPHERS THERMOGRAPHIES TRAINSPOTTINGS TRANSPLANTINGS TRANSPORTINGLY TRANSSHIPPINGS TROPOCOLLAGENS TROPOLOGICALLY UNAPPETISINGLY UNAPPETIZINGLY UNDERPAINTINGS UNDERSTRAPPING UNSYMPATHISING UNSYMPATHIZING UPGRADEABILITY UPSTANDINGNESS URANOGRAPHISTS WATERPROOFINGS XYLOTYPOGRAPHY ZOOPATHOLOGIES