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