There are 492 thirteen-letter words containing A, O, P and 2T, https://www.bestwordlist.com/c/a/5/13letterwordswithaoptt.htm
ACCEPTILATION ACTINOTHERAPY ADAPTATIONIST AMPHISTOMATAL AMPHISTOMATIC
ANTEPOSITIONS ANTHOPHYLLITE ANTHROPOLATRY ANTHROPOMETRY ANTHROPOPATHY
ANTHROPOPHYTE ANTICIPATIONS ANTICORPORATE ANTIPOLITICAL ANTIPOLLUTION
ANTIPREDATORY ANTIPSYCHOTIC ANTISTROPHONS APOCALYPTISTS APOCATASTASES
APOCATASTASIS APOLITICALITY APOTHEGMATISE APOTHEGMATIST APOTHEGMATIZE
APPORTIONMENT ARCTOPHILISTS ARTHROPATHIES ATTORNEYSHIPS AUTOCOMPLETES
BOOTSTRAPPERS BOOTSTRAPPING CAPACITATIONS CAPITULATIONS CARTOPHILISTS
CATASTROPHISM CATASTROPHIST CHEMAUTOTROPH COADAPTATIONS COMPARATIVIST
COMPARTMENTAL COMPARTMENTED COMPATIBILITY COMPATRIOTISM COMPUTABILITY
COMPUTATIONAL CONCEPTUALIST CONCEPTUALITY CONSTIPATIONS CONSTUPRATING
CONSTUPRATION CONTAINERPORT CONTEMPLATING CONTEMPLATION CONTEMPLATIST
CONTEMPLATIVE CONTEMPLATORS CONTRACEPTION CONTRACEPTIVE CONTRAPPOSTOS
CONTRAPUNTIST COOPERATIVITY COTRANSPORTED COTRANSPORTER CRYPTOCLASTIC
CRYPTOGAMISTS CYTOPATHOLOGY DECAPITATIONS DECREPITATION DEPOSITATIONS
DEPUTISATIONS DEPUTIZATIONS DERMATOPHYTES DERMATOPHYTIC DERMATOPLASTY
DIAPHOTOTROPY DICTATORSHIPS DICTYOPTERANS DISCEPTATIONS DISCEPTATIOUS
DISPLANTATION DISREPUTATION DITTOGRAPHIES ECTOPARASITES ECTOPARASITIC
ELECTROPLATED ELECTROPLATER ELECTROPLATES ENANTIOTROPIC ENHYPOSTATISE
ENHYPOSTATIZE ENTEROPATHIES EPIDOTISATION EPIDOTIZATION EPITHELIOMATA
EPITOMISATION EPITOMIZATION EQUIPARTITION EQUIPOTENTIAL ESPAGNOLETTES
EXPATRIATIONS EXPECTATIONAL EXPECTORATING EXPECTORATION EXPECTORATIVE
EXPECTORATORS EXPEDITATIONS EXPLANTATIONS EXPLOITATIONS EXPORTABILITY
EXPOSTULATING EXPOSTULATION EXPOSTULATIVE EXPOSTULATORS EXPOSTULATORY
EXTRAPOLATING EXTRAPOLATION EXTRAPOLATIVE EXTRAPOLATORS EXTRAPOLATORY
EXTRAPOSITION EXTRATROPICAL FLUORAPATITES FORTEPIANISTS GASTROSCOPIST
HAPTOTROPISMS HEMATOPOIETIC HEPATECTOMIES HEPATISATIONS HEPATIZATIONS
HEPATOLOGISTS HETEROPLASTIC HETEROPTERANS HETEROTYPICAL HOMEOPATHISTS
HOMOEOPATHIST HOSPITALITIES HYDROPATHISTS HYPNOTISATION HYPNOTIZATION
HYPOPITUITARY HYPOSTATISING HYPOSTATIZING HYPOTHECATING HYPOTHECATION
HYPOTHECATORS IMPENETRATION IMPLANTATIONS IMPORTABILITY IMPORTUNATELY
IMPOSTHUMATED IMPOSTHUMATES IMPOSTUMATING IMPOSTUMATION INADAPTATIONS
INEXPECTATION INHOSPITALITY INSPECTORATES INTERHOSPITAL INTEROPERATED
INTEROPERATES INTERPELLATOR INTERPETIOLAR INTERPOLATERS INTERPOLATING
INTERPOLATION INTERPOLATIVE INTERPOLATORS INTERTROPICAL INTRAPETIOLAR
ITEROPARITIES JUXTAPOSITION KERATOPLASTIC LACTOPROTEINS LYCANTHROPIST
MACHTPOLITIKS MALADAPTATION METACOMPUTERS METACOMPUTING METAMORPHISTS
METAPHOSPHATE METAPOLITICAL METROPOLITANS MISANTHROPIST MULTIHOSPITAL
MULTIPLICATOR MULTIPOLARITY MYTHOPOETICAL NATUROPATHIES NEOCAPITALIST
NEOPLASTICIST NEUROPATHISTS NONCAPITALIST OBSTREPERATED OBSTREPERATES
OBTEMPERATING ONOMATOPOETIC OPERATIONISTS OPERATIVITIES OPISTHOSOMATA
OPTIMISATIONS OPTIMIZATIONS OPTIONALITIES ORTHOGRAPHIST ORTHOPAEDISTS
OSTEOPATHISTS OSTEOPLASTIES OUTMANIPULATE OUTPLACEMENTS OUTPOPULATING
PAEDOBAPTISTS PALEOBOTANIST PALLETISATION PALLETIZATION PANTHEOLOGIST
PANTISOCRATIC PANTOPHAGISTS PANTOTHENATES PARASYNTHETON PAROTIDITISES
PARTICIPATION PARTICIPATORS PARTICIPATORY PARTITIONISTS PARTITIONMENT
PATHOGENICITY PATRIFOCALITY PATRIOTICALLY PATRONISATION PATRONIZATION
PEDANTOCRATIC PELLETISATION PELLETIZATION PENTASTICHOUS PENTOBARBITAL
PEPTONISATION PEPTONIZATION PERFECTATIONS PERFECTIONATE PERLUSTRATION
PERMUTATIONAL PERNOCTATIONS PERPETRATIONS PERPETUATIONS PERSCRUTATION
PERTURBATIONS PETRIFACTIONS PETRIFICATION PHLOGISTICATE PHONETISATION
PHONETIZATION PHOTOCATHODES PHOTOGELATINE PHOTOGRAPHIST PHOTOMONTAGES
PHOTONEGATIVE PHOTOREACTION PHOTOREACTIVE PHOTOREALISTS PHOTOSTATTING
PHOTOSYNTHATE PHOTOTELEGRAM PHOTOVOLTAICS PHREATOPHYTES PHREATOPHYTIC
PHYTOPATHOGEN PHYTOPLANKTER PHYTOPLANKTON PHYTOSANITARY PICTORIALISTS
PICTURISATION PICTURIZATION PIGMENTATIONS PLACENTATIONS PLANETOLOGIST
PLASTERSTONES PLASTINATIONS PLASTOMETRIES PLATINISATION PLATINIZATION
PLATITUDINOUS PLECTOGNATHIC PLUTOCRATICAL PNEUMATOLYTIC PNEUMATOMETER
PNEUMATOMETRY POCOCURANTIST POETASTERINGS POLITICASTERS POLLICITATION
POLYARTHRITIS POLYTONALISTS PONTIFICALITY PONTIFICATING PONTIFICATION
PONTIFICATORS PORTABILITIES POSTAPARTHEID POSTDEBUTANTE POSTDOCTORALS
POSTDOCTORATE POSTERISATION POSTERIZATION POSTGRADUATES POSTHOLOCAUST
POSTILLATIONS POSTISOLATION POSTLITERATES POSTMENSTRUAL POSTOPERATIVE
POSTROMANTICS POSTTRAUMATIC POSTTREATMENT POSTULANTSHIP POSTULATIONAL
POSTVASECTOMY POTAMOLOGISTS POTENTIATIONS PRACTITIONERS PREADAPTATION
PRECEPTORATES PRECIPITATION PRECIPITATORS PRECONTRACTED PREDESTINATOR
PREFORMATTING PREGUSTATIONS PREMEDITATION PREMEDITATORS PRENEGOTIATED
PRENEGOTIATES PRESENTATIONS PRESTIGIATORS PRETOURNAMENT PRIMATOLOGIST
PRIVATDOCENTS PRIVATDOZENTS PRIVATISATION PRIVATIZATION PROCAPITALIST
PROCRASTINATE PROFITABILITY PROGLOTTIDEAN PROGNOSTICATE PROLETARIATES
PROMOTABILITY PROPITIATIONS PROPITIATIOUS PROPORTIONATE PROSTANTHERAS
PROSTATECTOMY PROSTATITISES PROSTHODONTIA PROTACTINIUMS PROTECTORATES
PROTEOCLASTIC PROTESTATIONS PROTHETICALLY PROTOACTINIUM PROTOCERATOPS
PROTOCHORDATE PROTONOTARIAL PROTONOTARIAT PROTONOTARIES PROTOSPATAIRE
PROTOTHERIANS PROTUBERANTLY PROTUBERATING PROTUBERATION PSYCHOPATHIST
PTERODACTYLES PUNCTULATIONS PUNCTURATIONS PUTREFACTIONS PUTRIFICATION
PYRETOTHERAPY PYROTARTRATES RADIOTELETYPE READAPTATIONS REAPPOINTMENT
RECOMPUTATION REEXPORTATION REIMPORTATION REPARTITIONED REPATRIATIONS
REPETITIONARY REPLANTATIONS REPUNCTUATION RETINOPATHIES SEPARATIONIST
SEPTENTRIONAL SEXPLOITATION SOMATOPLASTIC SOMATOTROPHIC SOMATOTROPHIN
SOMATOTROPINE SOMATOTROPINS SOPHISTICATED SOPHISTICATES SOPHISTICATOR
SPECTATORSHIP SPERMATOBLAST SPERMATOCYTES SPERMATOPHYTE SPERMATOTHECA
SPONTANEITIES SPORTSCASTERS STATESPERSONS STENOGRAPHIST STENOPETALOUS
STEPHANOTISES STEREOTYPICAL STOMATOPLASTY STRATOSPHERES STRATOSPHERIC
STREPITATIONS STREPTOCARPUS STREPTOCOCCAL STREPTOKINASE STROPHANTHINS
STROPHIOLATED STUPEFACTIONS SUPERFETATION SUPERNATATION SUPERPATRIOTS
SUPERSTATIONS SUPPLANTATION SYMPATHECTOMY SYMPATHOLYTIC SYMPTOMATICAL
SYMPTOMATISED SYMPTOMATISES SYMPTOMATIZED SYMPTOMATIZES TACHISTOSCOPE
TAUTOPHONICAL TECHNOPOLITAN TELAUTOGRAPHY TELEPORTATION TEMPORALITIES
TEMPORISATION TEMPORIZATION TERATOPHOBIAS TETRAPLOIDIES TETRAPYRROLES
THANATOGRAPHY THANATOPHOBIA THEANTHROPIES THEANTHROPISM THEANTHROPIST
THEATROPHONES THERMOPLASTIC THERMOTHERAPY THIOSULPHATES THORACOPLASTY
TOTIPALMATION TRACHEOPHYTES TRAINSPOTTERS TRAINSPOTTING TRAMPOLINISTS
TRANSCRIPTION TRANSCRIPTOME TRANSPIRATION TRANSPIRATORY TRANSPORTABLE
TRANSPORTANCE TRANSPORTEDLY TRANSPORTINGS TRANSPOSITION TRANSPOSITIVE
TRANSUMPTIONS TRAPSHOOTINGS TREPHINATIONS TREPONEMATOUS TRICERATOPSES
TRICHOPTERANS TRICORPORATED TRIPARTITIONS TRIPHOSPHATES TRIPLICATIONS
TRIPLOBLASTIC TRIPUDIATIONS TROPHALLACTIC TROPHOBLASTIC TROPICALITIES
TROPOSCATTERS TYPIFICATIONS TYPOGRAPHISTS UNIMPORTANTLY VITUPERATIONS
XANTHOPTERINE XANTHOPTERINS