There are 609 thirteen-letter words containing A, H, O, P and T, https://www.bestwordlist.com/c/a/5/13letterwordswithahopt.htm
ACETAMINOPHEN ACHROMATOPSIA ACTINOMORPHIC ACTINOTHERAPY ADIAPHORISTIC
AETHRIOSCOPES ALLELOPATHIES ALPHABETIFORM AMPHICTYONIES AMPHIPROSTYLE
AMPHISTOMATAL AMPHISTOMATIC AMPHITRICHOUS ANAPHYLACTOID ANTHOPHYLLITE
ANTHROPOGENIC ANTHROPOLATRY ANTHROPOMETRY ANTHROPOMORPH ANTHROPOPATHY
ANTHROPOPHAGI ANTHROPOPHAGY ANTHROPOPHYTE ANTHROPOSOPHY ANTIPHONARIES
ANTIPSYCHOTIC ANTISTROPHONS AORTOGRAPHIES APHANIPTEROUS APHELIOTROPIC
APOCHROMATISM APOPHLEGMATIC APOSTROPHISED APOSTROPHISES APOSTROPHIZED
APOSTROPHIZES APOSTROPHUSES APOTHEGMATISE APOTHEGMATIST APOTHEGMATIZE
APOTHEOSISING APOTHEOSIZING ARCHAEOPTERYX ARCTOPHILISTS ARITHMOPHOBIA
ARTERIOGRAPHY ARTHROPATHIES ARTHROSCOPIES ARTHROSPOROUS ASPHYXIATIONS
ASSOCIATESHIP ASTHENOSPHERE ASTRAPOPHOBIA ASTROPHYSICAL ATMOSPHERICAL
ATTORNEYSHIPS AUTOBIOGRAPHY AUTOCEPHALIES AUTOCEPHALOUS AUTOGRAPHICAL
AUTOMORPHISMS AZATHIOPRINES BACTERIOPHAGE BACTERIOPHAGY BALNEOTHERAPY
BENTHOPELAGIC BIBLIOPHAGIST BIBLIOTHERAPY BLASTOSPHERES BLEPHAROPLAST
BRACHYPTEROUS BREASTPLOUGHS CARDIOPATHIES CARTOGRAPHERS CARTOGRAPHIES
CARTOPHILISTS CATASTROPHISM CATASTROPHIST CATHODOGRAPHS CATHODOGRAPHY
CEPHALISATION CEPHALIZATION CEPHALOMETERS CEPHALOMETRIC CEPHALOTHORAX
CEPHALOTOMIES CEROGRAPHISTS CHALCOPYRITES CHANNELOPATHY CHAPTERHOUSES
CHARTOGRAPHER CHARTOGRAPHIC CHEMAUTOTROPH CHEMOAUTROPHS CHIROGRAPHIST
CHIROPRACTICS CHIROPRACTORS CHLOROPLASTAL CHLOROPLASTIC CHROMATOGRAPH
CHROMATOPHORE CHROMATOPSIAS CHROMOTHERAPY CHRONOTHERAPY CINEMATOGRAPH
CLAUSTROPHOBE CLIMATOGRAPHY COADJUTORSHIP COAUTHORSHIPS CONSTABLESHIP
CONTAINERSHIP COPARTNERSHIP COPROPHAGISTS COPYRIGHTABLE COSMOGRAPHIST
CRYOTHERAPIES CRYPTOGRAPHER CRYPTOGRAPHIC CUSTODIANSHIP CYSTOGRAPHIES
CYTOPATHOLOGY DACTYLOGRAPHY DEMOGRAPHISTS DEPHLEGMATION DEPHLEGMATORS
DERMATOGRAPHY DERMATOPHYTES DERMATOPHYTIC DIAPHANOMETER DIAPHOTOTROPY
DIASTROPHISMS DICTATORSHIPS DIPHTHONGALLY DITTOGRAPHIES DODECAPHONIST
DRAUGHTPROOFS ELECTROGRAPHS ELECTROGRAPHY EMPHYSEMATOUS ENANTIOMORPHS
ENANTIOMORPHY ENCEPHALOMATA ENCEPHALOTOMY ENDOLYMPHATIC ENHYPOSTASIAS
ENHYPOSTATISE ENHYPOSTATIZE ENTEROPATHIES ENTOMOPHAGIES ENTOMOPHAGOUS
EPITHELIOMATA EPITRACHELION ERGATOMORPHIC ERYTHROPENIAS ERYTHROPHOBIA
ESOPHAGITIDES ESOPHAGITISES ETHNOGRAPHERS ETHNOGRAPHICA ETHNOGRAPHIES
EXOPHTHALMIAS FELDSPATHOIDS GASTROSOPHERS GASTROSOPHIES GERONTOPHILIA
GERONTOPHOBIA GLADIATORSHIP GLYPTOGRAPHER GLYPTOGRAPHIC GONADOTROPHIC
GONADOTROPHIN GRAMOPHONISTS GRAPHOLOGISTS HAEMOPROTEINS HAGIOGRAPHIST
HALIPLANKTONS HAPTOTROPISMS HARUSPICATION HECTOGRAPHIES HECTOGRAPHING
HELIOTROPICAL HEMATOPHAGOUS HEMATOPOIESES HEMATOPOIESIS HEMATOPOIETIC
HEPATECTOMIES HEPATISATIONS HEPATIZATIONS HEPATOLOGISTS HEPATOSCOPIES
HEPTADECANOIC HERMAPHRODITE HERPETOFAUNAE HERPETOFAUNAS HETEROCARPOUS
HETEROGRAPHIC HETEROPLASIAS HETEROPLASTIC HETEROPTERANS HETEROTYPICAL
HIPPOCENTAURS HIPPOPHAGISTS HIPPOPOTAMIAN HOLOPARASITES HOLOPARASITIC
HOLOPLANKTONS HOMEOPATHISTS HOMOEOPATHIES HOMOEOPATHIST HOMOEOTYPICAL
HORRIPILATING HORRIPILATION HOSPITALISING HOSPITALITIES HOSPITALIZING
HOUSEPAINTERS HYDNOCARPATES HYDROPATHICAL HYDROPATHISTS HYDROSULPHATE
HYDROTHERAPIC HYETOGRAPHIES HYMENOPTERANS HYPERCAUTIOUS HYPERMETROPIA
HYPERRATIONAL HYPERREACTORS HYPERROMANTIC HYPHENISATION HYPHENIZATION
HYPNOANALYTIC HYPNOTISATION HYPNOTIZATION HYPOACIDITIES HYPOGNATHISMS
HYPONATRAEMIA HYPONATRAEMIC HYPONATREMIAS HYPOPHOSPHATE HYPOPITUITARY
HYPOSTASISING HYPOSTASIZING HYPOSTATISING HYPOSTATIZING HYPOSULPHATES
HYPOTHECATING HYPOTHECATION HYPOTHECATORS HYPOXANTHINES HYPSOMETRICAL
ICHTHYOPSIDAN IMMUNOTHERAPY IMPERATORSHIP IMPOSTHUMATED IMPOSTHUMATES
INHOSPITALITY INTERHOSPITAL KINEMATOGRAPH LEPTOCEPHALIC LEPTOCEPHALUS
LITHOGRAPHERS LITHOGRAPHIES LITHOGRAPHING LITHOLAPAXIES LYCANTHROPIES
LYCANTHROPIST LYMPHOBLASTIC LYMPHOMATOSES LYMPHOMATOSIS MACHTPOLITIKS
MAGNETOGRAPHS MAGNETOSPHERE MASTIGOPHORAN MASTIGOPHORES MASTIGOPHORIC
MEDIATORSHIPS MESOTHERAPIES METALLOGRAPHY METALLOPHONES METAMORPHISMS
METAMORPHISTS METAMORPHOSED METAMORPHOSES METAMORPHOSIS METAPHOSPHATE
METENCEPHALON METEOROGRAPHS MISANTHROPIES MISANTHROPIST MODERATORSHIP
MONOGRAPHISTS MONOPHOSPHATE MONOPHTHONGAL MONOTHERAPIES MULTIHOSPITAL
MUSICOTHERAPY MYCETOPHAGOUS MYTHOGRAPHERS MYTHOGRAPHIES MYTHOPOETICAL
NATUROPATHIES NEPHROPATHIES NEUROPATHICAL NEUROPATHISTS NONALPHABETIC
NONPATHOGENIC NONPHOSPHATES ODONTOPHOBIAS ODONTOPHORANS OMMATOPHOROUS
ONYCHOPHAGIST OPENHEARTEDLY OPHTHALMOLOGY OPISTHOBRANCH OPISTHOGRAPHS
OPISTHOGRAPHY OPISTHOSOMATA ORGANOTHERAPY ORNITHOPHOBIA ORTHOCEPHALIC
ORTHOEPICALLY ORTHOGRAPHERS ORTHOGRAPHIES ORTHOGRAPHIST ORTHOPAEDICAL
ORTHOPAEDISTS ORTHOPINAKOID OSTEOGRAPHIES OSTEOPATHISTS OSTREOPHAGIES
OSTREOPHAGOUS PAEDOTROPHIES PANCHROMATISM PANOPHTHALMIA PANTECHNICONS
PANTHEOLOGIES PANTHEOLOGIST PANTOGRAPHERS PANTOGRAPHIES PANTOPHAGISTS
PANTOTHENATES PARASYNTHETON PARATHORMONES PARTHENOCARPY PARTHENOGENIC
PARTHENOSPORE PATHOGENICITY PATHOGNOMONIC PATHOGRAPHIES PATHOLOGISING
PATHOLOGIZING PELOTHERAPIES PENTADELPHOUS PENTASTICHOUS PETROCHEMICAL
PETROGRAPHERS PETROGRAPHIES PETROPHYSICAL PHAGOCYTISING PHAGOCYTIZING
PHAGOCYTOSING PHALLOCENTRIC PHANEROPHYTES PHANTASMAGORY PHELLOPLASTIC
PHENOBARBITAL PHENOMENALIST PHENOMENALITY PHENOTHIAZINE PHENTOLAMINES
PHILANTHROPES PHILANTHROPIC PHILOMATHICAL PHLEBOTOMICAL PHLOGISTICATE
PHONASTHENIAS PHONAUTOGRAPH PHONETISATION PHONETIZATION PHONOCAMPTICS
PHONOGRAPHIST PHONOMETRICAL PHOSPHATIDYLS PHOSPHATISING PHOSPHATIZING
PHOSPHATURIAS PHOSPHORATING PHOSPHORYLATE PHOTOCATHODES PHOTOCHEMICAL
PHOTOCOPIABLE PHOTODYNAMICS PHOTOENGRAVED PHOTOENGRAVER PHOTOENGRAVES
PHOTOGELATINE PHOTOGRAPHERS PHOTOGRAPHIES PHOTOGRAPHING PHOTOGRAPHIST
PHOTOGRAVURES PHOTOMACHINES PHOTOMONTAGES PHOTONEGATIVE PHOTOREACTION
PHOTOREACTIVE PHOTOREALISMS PHOTOREALISTS PHOTOSCANNING PHOTOSTATTING
PHOTOSYNTHATE PHOTOTELEGRAM PHOTOVOLTAICS PHRAGMOPLASTS PHRASEOLOGIST
PHREATOPHYTES PHREATOPHYTIC PHTHALOCYANIN PHYCOXANTHINS PHYSIOLATRIES
PHYSIOTHERAPY PHYTOCHEMICAL PHYTOGRAPHERS PHYTOGRAPHIES PHYTONADIONES
PHYTOPATHOGEN PHYTOPLANKTER PHYTOPLANKTON PHYTOSANITARY PICTOGRAPHIES
PLECTOGNATHIC PLETHORICALLY PLETHYSMOGRAM PNEUMATOPHORE POLYARTHRITIS
POLYCHROMATIC POLYCYTHAEMIA POLYCYTHEMIAS POLYGRAPHISTS POLYHISTORIAN
POLYTECHNICAL POLYTHALAMOUS POLYURETHANES POSTAPARTHEID POSTHOLOCAUST
POSTULANTSHIP POTICHOMANIAS PREADULTHOODS PREAUTHORIZED PREAUTHORIZES
PREHISTORIANS PREHISTORICAL PROCATHEDRALS PROMETHAZINES PROMONARCHIST
PROPHETICALLY PROPHYLACTICS PROSENCHYMATA PROSTANTHERAS PROSTHODONTIA
PROTHETICALLY PROTOCHORDATE PROTOTHERIANS PSILANTHROPIC PSYCHOANALYST
PSYCHOPATHICS PSYCHOPATHIES PSYCHOPATHIST PSYCHOSOMATIC PSYCHOTHERAPY
PSYCHOTICALLY PTERYLOGRAPHY PTOCHOCRACIES PYRETOTHERAPY PYROCATECHINS
PYROCATECHOLS PYROPHOSPHATE PYROSULPHATES PYROTECHNICAL QUAESTORSHIPS
RADICULOPATHY RADIOPHONISTS RAPPROCHEMENT REFLECTOGRAPH REHOSPITALISE
REHOSPITALIZE RELATIONSHIPS REPHOTOGRAPHS RETINOPATHIES RETROPHILIACS
RHAMPHOTHECAE RHINOPLASTIES RHYTHMOPOEIAS RONTGENOGRAPH SAPROPHYTISMS
SATANOPHANIES SATANOPHOBIAS SCLEROTHERAPY SCOPTOPHILIAS SCOPTOPHOBIAS
SEROTHERAPIES SHARPSHOOTERS SHARPSHOOTING SNAPSHOOTINGS SOMATOTROPHIC
SOMATOTROPHIN SOPHISTICALLY SOPHISTICATED SOPHISTICATES SOPHISTICATOR
SOUSAPHONISTS SPATCHCOCKING SPECTATORSHIP SPECTROGRAPHS SPECTROGRAPHY
SPELEOTHERAPY SPERMATOPHORE SPERMATOPHYTE SPERMATORRHEA SPERMATOTHECA
SPHACELATIONS SPHAGNOLOGIST SPORTSMANSHIP STAPHYLOCOCCI STASIMORPHIES
STEGANOGRAPHS STEGANOGRAPHY STENOGRAPHERS STENOGRAPHIES STENOGRAPHING
STENOGRAPHIST STEPHANOTISES STEREOGRAPHED STEREOGRAPHIC STRATOSPHERES
STRATOSPHERIC STROPHANTHINS STROPHIOLATED STYLOGRAPHIES SULPHONATIONS
SULPHURATIONS SURROGATESHIP SYCOPHANTICAL SYCOPHANTISED SYCOPHANTISES
SYCOPHANTISMS SYCOPHANTIZED SYCOPHANTIZES SYCOPHANTLIER SYCOPHANTRIES
SYMPATHECTOMY SYMPATHOLYTIC SYPHILISATION SYPHILIZATION TACHISTOSCOPE
TAPHROGENESES TAPHROGENESIS TAUROMORPHOUS TAUTOPHONICAL TECHNOPHILIAS
TECHNOPHOBIAS TECHNOPOLITAN TELAUTOGRAPHY TELENCEPHALON TENORRHAPHIES
TEPHROMANCIES TERATOPHOBIAS TERPSICHOREAL TERPSICHOREAN THANATOGRAPHY
THANATOPHOBIA THEANTHROPIES THEANTHROPISM THEANTHROPIST THEATROPHONES
THERMOGRAPHER THERMOGRAPHIC THERMOPLASTIC THERMOTHERAPY THIOSULPHATES
THORACOPLASTY THORACOSCOPES THOROUGHPACED THROMBOPHILIA TOPOGRAPHICAL
TOXICOPHAGOUS TOXICOPHOBIAS TRACHEOPHYTES TRAPEZOHEDRAL TRAPEZOHEDRON
TRAPSHOOTINGS TREPHINATIONS TRICHOPTERANS TRIPHOSPHATES TROPHALLACTIC
TROPHOBLASTIC TYPOGRAPHICAL TYPOGRAPHISTS UNPROPHETICAL URANOGRAPHIST
VIBRAPHONISTS WEATHERPERSON WEATHERPROOFS XANTHOPTERINE XANTHOPTERINS
XEROPHTHALMIA XEROPHTHALMIC XIPHIPLASTRON ZINJANTHROPUS