There are 433 thirteen-letter words containing 2A, N, P and T, https://www.bestwordlist.com/c/a/5/13letterwordswithaanpt.htm ACCEPTILATION ACCOMPANIMENT ACCOMPANYISTS ACETAMINOPHEN ACTINOTHERAPY ADAPTABLENESS ADAPTATIONIST ADAPTEDNESSES AEROPLANKTONS ALPHABETARIAN ALPHABETISING ALPHABETIZING AMPLIFICATION ANALPHABETICS ANALPHABETISM ANAPHYLACTOID ANGIOPLASTIES ANISOMETROPIA ANTEPENULTIMA ANTHROPOLATRY ANTHROPOPATHY ANTHROPOPHAGI ANTHROPOPHAGY ANTIAPARTHEID ANTICIPATABLE ANTICIPATIONS ANTICORPORATE ANTIPARALLELS ANTIPARASITIC ANTIPARTICLES ANTIPHONARIES ANTIPLATELETS ANTIPOLITICAL ANTIPREDATORY ANTISPASMODIC ANTITYPICALLY APHANIPTEROUS APLANATICALLY APLANOGAMETES APPELLATIONAL APPENDICULATE APPERTAINANCE APPERTAINMENT APPORTIONABLE APPRAISEMENTS APPRECIATIONS APPROPINQUATE APPROPRIATING APPROPRIATION APPROXIMATING APPROXIMATION APPURTENANCES APTITUDINALLY ARPEGGIATIONS ASPHYXIATIONS ASSISTANTSHIP AZATHIOPRINES BALNEOTHERAPY BIPARTISANISM CALLITHUMPIAN CAMPANOLOGIST CANDIDATESHIP CAPACITATIONS CAPITULATIONS CAPRIFICATION CAPTIVATINGLY CARPETBAGGING CEPHALISATION CEPHALIZATION CHANNELOPATHY CINEMATOGRAPH CLEPTOMANIACS COADAPTATIONS COMPAGINATING COMPAGINATION COMPARTMENTAL COMPASSIONATE COMPLAISANTLY COMPLANATIONS COMPUTATIONAL CONVERTAPLANE COPLANARITIES CRAFTMANSHIPS CRAFTSMANSHIP CRYPTANALYSES CRYPTANALYSIS CRYPTANALYSTS CRYPTANALYTIC DEASPIRATIONS DECAPITATIONS DECAPSULATING DECAPSULATION DEPAUPERATING DEUTERANOPIAS DIAPHANEITIES DIAPHANOMETER DILAPIDATIONS DISPARAGEMENT DISPARATENESS DISPASSIONATE DISPLANTATION DISPLEASANTED DRAFTSMANSHIP ELEPHANTIASES ELEPHANTIASIC ELEPHANTIASIS EMANCIPATIONS ENCAPSULATING ENCAPSULATION ENCEPHALOMATA ENDOPARASITES ENDOPARASITIC ENHYPOSTASIAS EPINASTICALLY EPISTOLARIANS EQUIPARATIONS ETHNOGRAPHICA EUSPORANGIATE EXASPERATIONS EXPANDABILITY EXPATRIATIONS EXPECTATIONAL EXPLANATIVELY EXPLANATORILY EXPLANTATIONS EXPLORATIONAL EXTRAPOLATING EXTRAPOLATION FLUNITRAZEPAM GALVANOPLASTY GALVANOTROPIC GRANDPARENTAL GRANTSMANSHIP HALIPLANKTONS HAPPENSTANCES HARUSPICATING HARUSPICATION HEPATISATIONS HEPATIZATIONS HEPTADECANOIC HERPETOFAUNAE HERPETOFAUNAS HIPPOPOTAMIAN HYDNOCARPATES HYPERRATIONAL HYPNOANALYTIC HYPONATRAEMIA HYPONATRAEMIC HYPONATREMIAS IMPARIPINNATE IMPARTIALNESS IMPLANTATIONS IMPLICATIONAL IMPREGNATABLE INADAPTATIONS INAPPROPRIATE INCAPACITANTS INCAPACITATED INCAPACITATES INCAPSULATING INCAPSULATION INSPIRATIONAL INTERPARIETAL INTERSCAPULAR INTRACAPSULAR INTRAPARIETAL INTRAPERSONAL INTRAPETIOLAR KINEMATOGRAPH KLEPTOMANIACS MAGNETOGRAPHS MAGNETOPAUSES MALABSORPTION MALADAPTATION MANIPULATABLE MANIPULATIONS MANIPULATIVES MASTIGOPHORAN MEGALOPOLITAN METAPHYSICIAN NANNOPLANKTON NANOPARTICLES NANOPLANKTONS NAPHTHALISING NAPHTHALIZING NAPHTHYLAMINE NATUROPATHIES NEOCAPITALISM NEOCAPITALIST NEUROPATHICAL NITROPARAFFIN NONACCEPTANCE NONALPHABETIC NONCAPITALIST NONPARAMETRIC ONOMATOPOEIAS OPERATIONALLY ORGANOTHERAPY OUTMANIPULATE PACIFICATIONS PAEDIATRICIAN PAGANISATIONS PAGANIZATIONS PAINSTAKINGLY PAINTBALLINGS PALAEOBOTANIC PALAEOCURRENT PALAEONTOLOGY PALATABLENESS PALEOBOTANIES PALEOBOTANIST PALEOMAGNETIC PALIFICATIONS PALLETISATION PALLETIZATION PALMIFICATION PALUDAMENTUMS PANAESTHESIAS PANAESTHETISM PANCHROMATISM PANCYTOPENIAS PANDICULATION PANGRAMMATIST PANIFICATIONS PANOPHTHALMIA PANRADIOMETER PANSEXUALISTS PANSPERMATISM PANSPERMATIST PANTHEISTICAL PANTISOCRATIC PANTOGRAPHERS PANTOGRAPHIES PANTOPHAGISTS PANTOTHENATES PARAGNATHISMS PARALYSATIONS PARALYZATIONS PARAMAGNETISM PARAMENSTRUUM PARAMETRISING PARAMETRIZING PARAMOUNTCIES PARANORMALITY PARASYMBIONTS PARASYNTHESES PARASYNTHESIS PARASYNTHETIC PARASYNTHETON PARATHORMONES PARENTHETICAL PARLIAMENTARY PARLIAMENTING PARTHENOCARPY PARTIALNESSES PARTICIPANTLY PARTICIPATING PARTICIPATION PARTISANSHIPS PARTIZANSHIPS PARVANIMITIES PATENTABILITY PATERNALISTIC PATRILINEAGES PATRILINEALLY PATRILINEARLY PATRIMONIALLY PATRONISATION PATRONIZATION PAUPERISATION PAUPERIZATION PEDANTOCRATIC PEDIATRICIANS PENALISATIONS PENALIZATIONS PENEPLANATION PENTABARBITAL PENTADACTYLES PENTADACTYLIC PENTAHYDRATES PENTASYLLABIC PENTAVALENCES PENTOBARBITAL PERAMBULATING PERAMBULATION PERMANGANATES PERMUTATIONAL PHALANSTERIAN PHALANSTERIES PHALANSTERISM PHALANSTERIST PHANTASMAGORY PHANTASMALIAN PHANTASMALITY PHENOBARBITAL PHONASTHENIAS PHONAUTOGRAPH PHTHALOCYANIN PHYTOSANITARY PIANISTICALLY PLACENTATIONS PLANETESIMALS PLANIMETRICAL PLANTOCRACIES PLASTINATIONS PLASTOCYANINS PLATINISATION PLATINIZATION PLATINOCYANIC PLATYRRHINIAN PLURALISATION PLURALIZATION PNEUMATICALLY POLARISATIONS POLARIZATIONS POLYCARBONATE POSTCRANIALLY POSTINAUGURAL POSTLAPSARIAN POSTULATIONAL POTICHOMANIAS PRACTICALNESS PREACQUAINTED PREADAPTATION PREAMBULATING PRECAUTIONARY PREDICAMENTAL PRETERNATURAL PREVARICATING PREVARICATION PREVOCATIONAL PRIVATEERSMAN PRIVATISATION PRIVATIZATION PROBATIONALLY PROCLAMATIONS PROCRASTINATE PROCREATIONAL PROGRADATIONS PROPAGANDISTS PROPAGATIONAL PROPRAETORIAN PROSENCHYMATA PROSTAGLANDIN PROSTANTHERAS PROTANOMALIES PROTANOMALOUS PROTOLANGUAGE PROTONOTARIAL PROTONOTARIAT PSYCHASTHENIA PSYCHOANALYST PTERIDOMANIAS PTEROSAURIANS PURITANICALLY PUTANGITANGIS RAMAPITHECINE REACCEPTANCES READAPTATIONS REAPPLICATION REPAGINATIONS REPATRIATIONS REPLANTATIONS RESPIRATIONAL SANDPAINTINGS SANDPAPERIEST SATANOPHANIES SATANOPHOBIAS SCAPEGOATINGS SCAPULIMANTIC SCAPULOMANTIC SEMIPALMATION SEPARATIONISM SEPARATIONIST SPERMATOGONIA SPERMATOZOANS SPHACELATIONS STANDPATTISMS STAPHYLINIDAE STATESMANSHIP STEGANOGRAPHS STEGANOGRAPHY STRAPHANGINGS SUPERABUNDANT SUPERANNUATED SUPERANNUATES SUPERNATATION SUPERNATIONAL SUPERNATURALS SUPPLANTATION SUPRANATIONAL SUPRARATIONAL SYCOPHANTICAL SYNAPOSEMATIC TAUTOPHONICAL TEMPERAMENTAL THANATOGRAPHY THANATOPHOBIA TOTIPALMATION TRANSCRIPTASE TRANSPARENCES TRANSPARENTLY TRANSPERSONAL TRANSPIRATION TRANSPIRATORY TRANSPLANTERS TRANSPLANTING TRANSPORTABLE TRANSPORTANCE TRYPAFLAVINES UNACCEPTANCES UNANTICIPATED UNAPOSTOLICAL UNAPPRECIATED UNAPPROPRIATE UNCAPITALISED UNCAPITALIZED UNCOMPLAISANT UNIPARENTALLY UNMANIPULATED UNPARASITISED UNPARASITIZED UNPRACTICABLE UNPRACTICALLY UNSPECTACULAR UNTRANSPARENT URANOGRAPHIST URANOPLASTIES VAPORISATIONS VAPORIZATIONS WATERMANSHIPS WEAPONIZATION YACHTSMANSHIP