There are 597 thirteen-letter words containing A, 2O, P and T, https://www.bestwordlist.com/c/a/5/13letterwordswithaoopt.htm
ACHROMATOPSIA ACTINOMORPHIC ADRENOCEPTORS AEROPLANKTONS AETHRIOSCOPES
ANISOMETROPIA ANISOMETROPIC ANISOTROPISMS ANTEPOSITIONS ANTHROPOGENIC
ANTHROPOLATRY ANTHROPOMETRY ANTHROPOMORPH ANTHROPOPATHY ANTHROPOPHAGI
ANTHROPOPHAGY ANTHROPOPHYTE ANTHROPOSOPHY ANTICORPORATE ANTIGROPELOES
ANTIPOLLUTION ANTISTROPHONS AORTOGRAPHIES APHELIOTROPIC APOCHROMATISM
APOGEOTROPISM APOSTOLICALLY APOSTOLICISMS APOSTROPHISED APOSTROPHISES
APOSTROPHIZED APOSTROPHIZES APOSTROPHUSES APOTHEOSISING APOTHEOSIZING
APPORTIONABLE APPORTIONMENT APPROPRIATION APPROPRIATORS APPROXIMATION
ARITHMOPHOBIA ARTHROSCOPIES ARTHROSPOROUS ASTRAPOPHOBIA AUTOBIOGRAPHY
AUTOCEPHALOUS AUTOCOMPLETES AUTOEXPOSURES AUTOMORPHISMS AUTOPOLYPLOID
BALLISTOSPORE BARORECEPTORS BIOCOMPATIBLE BOOTSTRAPPERS BOOTSTRAPPING
CALCIPOTRIOLS CAMPANOLOGIST CATHODOGRAPHS CATHODOGRAPHY CEPHALOTHORAX
CEPHALOTOMIES CHEMAUTOTROPH CHEMOAUTROPHS CHIROPRACTORS CHLOROPLASTAL
CHLOROPLASTIC CHROMATOGRAPH CHROMATOPHORE CHROMATOPSIAS CHROMOTHERAPY
CHRONOTHERAPY CLAUSTROPHOBE COADAPTATIONS COADJUTORSHIP COAUTHORSHIPS
COCONSPIRATOR COMPAGINATION COMPASSIONATE COMPATRIOTISM COMPELLATIONS
COMPENSATIONS COMPLANATIONS COMPLEXATIONS COMPLICATIONS COMPOSITIONAL
COMPOSITORIAL COMPURGATIONS COMPUTATIONAL CONCORPORATED CONCORPORATES
CONSPIRATIONS CONSPURCATION CONSTIPATIONS CONSTUPRATION CONTAINERPORT
CONTEMPLATION CONTEMPLATORS CONTRACEPTION CONTRAPPOSTOS CONVERTOPLANE
COOPERATIVELY COOPERATIVITY COPROPHAGISTS CORPORALITIES CORPORATENESS
CORPORATISING CORPORATIVISM CORPORATIZING CORPOREALISTS COSMOGRAPHIST
COSMOPOLITANS COTRANSPORTED COTRANSPORTER CRANIOSCOPIST CRYOPLANKTONS
CRYPTOLOGICAL CYTOPATHOLOGY DEOPPILATIONS DEPOPULATIONS DEPOSITATIONS
DESPOLIATIONS DIAGEOTROPISM DIAPHOTOTROPY DIPLOMATOLOGY DISCORPORATED
DISCORPORATES DISOPERATIONS DISPOSITIONAL DODECAPHONIST DRAUGHTPROOFS
ENANTIOMORPHS ENANTIOMORPHY ENANTIOTROPIC ENCEPHALOTOMY ENTOMOPHAGIES
ENTOMOPHAGOUS EPIDOTISATION EPIDOTIZATION EPITOMISATION EPITOMIZATION
EPIZOOTICALLY ERGATOMORPHIC ERYTHROPHOBIA ESCAPOLOGISTS EVAPOROMETERS
EXPECTORATION EXPECTORATORS EXPLOITATIONS EXPLORATIONAL EXPOSTULATION
EXPOSTULATORS EXPOSTULATORY EXPROBRATIONS EXPROPRIATION EXPROPRIATORS
EXTRAPOLATION EXTRAPOLATORS EXTRAPOLATORY EXTRAPOSITION FLAVOPROTEINS
GALVANOTROPIC GASTEROPODOUS GASTROSCOPIES GASTROSCOPIST GASTROSOPHERS
GASTROSOPHIES GEOPOLITICIAN GEOTROPICALLY GERONTOPHILIA GERONTOPHOBIA
GONADOTROPHIC GONADOTROPHIN GONADOTROPINS GRAMOPHONISTS GRAPHOLOGISTS
HAEMOPROTEINS HAPTOTROPISMS HELIOTROPICAL HEMATOPHAGOUS HEMATOPOIESES
HEMATOPOIESIS HEMATOPOIETIC HEPATOLOGISTS HEPATOSCOPIES HETEROCARPOUS
HIPPOPOTAMIAN HOLOPARASITES HOLOPARASITIC HOLOPLANKTONS HOMEOPATHISTS
HOMOEOPATHIES HOMOEOPATHIST HOMOEOTYPICAL HORRIPILATION HYPNOTISATION
HYPNOTIZATION HYPOPHOSPHATE HYPOTHECATION HYPOTHECATORS IMPERFORATION
IMPERSONATION IMPERSONATORS IMPIGNORATION IMPOSTUMATION IMPROPRIATION
IMPROPRIATORS IMPROVISATION IMPROVISATORE IMPROVISATORI IMPROVISATORS
IMPROVISATORY INCORPORATING INCORPORATION INCORPORATIVE INCORPORATORS
INFRAPOSITION INOCCUPATIONS INTERPOLATION INTERPOLATORS ISOTROPICALLY
JUXTAPOSITION LACTOPROTEINS LAPAROSCOPIST LYMPHOMATOSES LYMPHOMATOSIS
MALABSORPTION MASTIGOPHORAN MASTIGOPHORES MASTIGOPHORIC MEGALOPOLITAN
MELANOTROPINS MEROPLANKTONS METALLOPHONES METAMORPHOSED METAMORPHOSES
METAMORPHOSIS METEOROGRAPHS METROPOLITANS MICROPLANKTON MODERATORSHIP
MONOGRAPHISTS MONOPHOSPHATE MONOPHTHONGAL MONOTHERAPIES MYCETOPHAGOUS
MYTHOPOETICAL NANNOPLANKTON NANOCOMPOSITE NANOPLANKTONS NONABSORPTIVE
NONCOMPATIBLE NONCONCEPTUAL NONCOOPERATOR NONDIPLOMATIC NONPATHOGENIC
NONPHOSPHATES NONPOLITICIAN ODONTOPHOBIAS ODONTOPHORANS OMMATOPHOROUS
OMOPLATOSCOPY ONOMATOPOEIAS ONOMATOPOESES ONOMATOPOESIS ONOMATOPOETIC
ONYCHOPHAGIST OPERATIONALLY OPERATIONISMS OPERATIONISTS OPHTHALMOLOGY
OPINIONATEDLY OPISTHOBRANCH OPISTHOGRAPHS OPISTHOGRAPHY OPISTHOSOMATA
OPPIGNERATION OPPIGNORATING OPPIGNORATION OPSONISATIONS OPSONIZATIONS
OPTIMISATIONS OPTIMIZATIONS OPTIONALITIES ORGANOTHERAPY ORNITHOPHOBIA
ORTHOCEPHALIC ORTHOEPICALLY ORTHOGRAPHERS ORTHOGRAPHIES ORTHOGRAPHIST
ORTHOPAEDICAL ORTHOPAEDISTS ORTHOPINAKOID OSTEOGRAPHIES OSTEOPATHISTS
OSTEOPLASTIES OSTREOPHAGIES OSTREOPHAGOUS OUTPASSIONING OUTPOPULATING
OVEROPERATING OVERPOPULATED OVERPOPULATES OVIPOSITIONAL OVOVIVIPARITY
PAEDOTROPHIES PALAEOBOTANIC PALAEONTOLOGY PALEOBOTANIES PALEOBOTANIST
PALEONTOLOGIC PALLIDOTOMIES PALYNOLOGISTS PANTHEOLOGIES PANTHEOLOGIST
PAPILLOMATOUS PAPYROLOGISTS PARASITOLOGIC PARATHORMONES PARTHENOSPORE
PARTICOLOURED PATHOGNOMONIC PATHOLOGISING PATHOLOGIZING PATRONISATION
PATRONIZATION PEPTONISATION PEPTONIZATION PERFOLIATIONS PERIODISATION
PERIODIZATION PERIODONTALLY PERNOCTATIONS PEROXIDATIONS PHAGOCYTOSING
PHLEBOTOMICAL PHONAUTOGRAPH PHONETISATION PHONETIZATION PHONOCAMPTICS
PHONOGRAPHIST PHONOMETRICAL 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 PHRASEOLOGIST
PHYTONADIONES PHYTOPATHOGEN PHYTOPLANKTON PLAGIOSTOMOUS PLAGIOTROPISM
PLAGIOTROPOUS PLANETOLOGIES PLANETOLOGIST PLASTOQUINONE PNEUMATOPHORE
POCOCURANTISM POCOCURANTIST PODSOLISATION PODSOLIZATION PODZOLISATION
PODZOLIZATION POLARISATIONS POLARIZATIONS POLLICITATION POLYCARBONATE
POLYCHROMATIC POLYDACTYLOUS POLYHISTORIAN POLYTHALAMOUS POLYTONALISMS
POLYTONALISTS PONTIFICATION PONTIFICATORS PORNIFICATION POSSESSIONATE
POSTCONCILIAR POSTDOCTORALS POSTDOCTORATE POSTEMBRYONAL POSTERISATION
POSTERIZATION POSTHOLOCAUST POSTILLATIONS POSTISOLATION POSTMENOPAUSE
POSTOPERATIVE POSTROMANTICS POSTSECONDARY POSTULATIONAL POSTVASECTOMY
POTAMOLOGICAL POTAMOLOGISTS POTENTIATIONS POTICHOMANIAS POWERBOATINGS
PREADMONITION PREADULTHOODS PRECONISATION PRECONIZATION PRECOPULATORY
PREDOMINATION PREDOMINATORS PREFLORATIONS PREFOLIATIONS PREFORMATIONS
PRENOMINATION PREOCCUPATION PREORDINATION PREPOSITIONAL PREVOCATIONAL
PRIMATOLOGIES PRIMATOLOGIST PROBATIONALLY PROCLAMATIONS PROCONSULATES
PROCREATIONAL PROCTOLOGICAL PROCURATORIAL PROCURATORIES PROFESSORATES
PROFESSORIATE PROFESSORIATS PROGENITORIAL PROGLOTTIDEAN PROGNOSTICATE
PROGRADATIONS PROLIFERATION PROLIFICATION PROLONGATIONS PROMONARCHIST
PROMOTABILITY PROMULGATIONS PRONUNCIATION PROPAGATIONAL PROPAROXYTONE
PROPITIATIONS PROPITIATIOUS PROPORTIONALS PROPORTIONATE PROPOSITIONAL
PROPRAETORIAL PROPRAETORIAN PROPRIETORIAL PROPUGNATIONS PROSECUTORIAL
PROSTATECTOMY PROSTHODONTIA PROTANOMALIES PROTANOMALOUS PROTECTORATES
PROTEINACEOUS PROTEOCLASTIC PROTEOGLYCANS PROTERANDROUS PROTESTATIONS
PROTOACTINIUM PROTOCERATOPS PROTOCHORDATE PROTOGALAXIES PROTOLANGUAGE
PROTONOTARIAL PROTONOTARIAT PROTONOTARIES PROTOSPATAIRE PROTOTHERIANS
PROTUBERATION PROVOCATIVELY PSYCHOSOMATIC PTOCHOCRACIES PYROCATECHOLS
PYROPHOSPHATE RADIOISOTOPES RADIOISOTOPIC RADIOPHONISTS REABSORPTIONS
REAPPORTIONED RECIPROCATION RECIPROCATORS RECIPROCATORY RECOMPILATION
RECOMPUTATION REEXPLORATION REEXPORTATION REIMPORTATION REINCORPORATE
REOCCUPATIONS REPHOTOGRAPHS REPOPULATIONS REPORTORIALLY RHYTHMOPOEIAS
RONTGENOGRAPH RONTGENOPAQUE SATANOPHOBIAS SCOPTOPHILIAS SCOPTOPHOBIAS
SEXPLOITATION SHARPSHOOTERS SHARPSHOOTING SNAPSHOOTINGS SOMATOPLASTIC
SOMATOPLEURAL SOMATOPLEURES SOMATOPLEURIC SOMATOTROPHIC SOMATOTROPHIN
SOMATOTROPINE SOMATOTROPINS SOPHISTICATOR SOUSAPHONISTS SPELAEOLOGIST
SPERMATOGONIA SPERMATOPHORE SPERMATOZOANS SPERMATOZOIDS SPHAGNOLOGIST
SPLAYFOOTEDLY SPONGIOBLASTS SPONTANEOUSLY STAPHYLOCOCCI STEGANOPODOUS
STENOPETALOUS STOMATOPLASTY STREPTOCOCCAL STROPHIOLATED SUBPOPULATION
SULPHONATIONS SUPEREROGATOR SUPPOSITIONAL TABLESPOONFUL TACHISTOSCOPE
TAUROMORPHOUS TAUTOPHONICAL TECHNOPHOBIAS TECHNOPOLITAN TELEPORTATION
TEMPORISATION TEMPORIZATION TERATOPHOBIAS THANATOPHOBIA THEATROPHONES
THORACOPLASTY THORACOSCOPES THOROUGHPACED THROMBOPHILIA TOPOGRAPHICAL
TOPOISOMERASE TOPOLOGICALLY TOTIPALMATION TOXICOPHAGOUS TOXICOPHOBIAS
TOXOPLASMOSES TOXOPLASMOSIS TRANSPOSITION TRAPEZOHEDRON TRAPSHOOTINGS
TREPONEMATOUS TRICORPORATED TROPHOBLASTIC TROPOCOLLAGEN TROPOSCATTERS
TYPOLOGICALLY UNAPOSTOLICAL UNCOOPERATIVE UNPROVOCATIVE VAPORISATIONS
VAPORIZATIONS VELOCIRAPTORS WATERPROOFERS WATERPROOFING WEAPONIZATION
WEATHERPROOFS ZOOPLANKTONIC