There are 621 fourteen-letter words containing A, 2E, P and T, https://www.bestwordlist.com/c/a/5/14letterwordswithaeept.htm ABSORPTIOMETER ABSORPTIVENESS ACCEPTABLENESS ACETAMINOPHENS ADAPTIVENESSES AMINOPEPTIDASE ANTEPENULTIMAS ANTHROPOGENIES ANTIDEPRESSANT ANTIDEPRESSION ANTIEPILEPTICS ANTIPERISTASES ANTIRESORPTIVE ANTISEPTICISED ANTISEPTICISES ANTISEPTICIZED ANTISEPTICIZES APERIODICITIES APOTHEGMATISED APOTHEGMATISES APOTHEGMATIZED APOTHEGMATIZES APPARENTNESSES APPENDECTOMIES APPENDICECTOMY APPENDICITISES APPERTAINANCES APPERTAINMENTS APPETEEZEMENTS APPOSITENESSES APPRECIATIVELY APPRENTICEHOOD APPRENTICEMENT APPRENTICESHIP APPROXIMEETING AROMATHERAPIES ASTHENOSPHERES ASTHENOSPHERIC BACTERIOPHAGES CALCIPOTRIENES CAPELLMEISTERS CAPTIOUSNESSES CATECHUMENSHIP CENTRIPETALISM CEPHALOMETRIES CHARTERPARTIES CHEMOTHERAPIES CHEMOTHERAPIST CHROMATOSPHERE CLAPTRAPPERIES COMETOGRAPHIES COMPATIBLENESS COMPLEMENTALLY COMPUTERISABLE COMPUTERIZABLE CONCEPTUALISED CONCEPTUALISER CONCEPTUALISES CONCEPTUALIZED CONCEPTUALIZER CONCEPTUALIZES CONTEMPERATION CONTEMPERATURE CONTEMPLATIVES CONTEMPORANEAN CONTEMPORARIES CONTRACEPTIVES CONVERTAPLANES CONVERTIPLANES CONVERTOPLANES CORPOREALITIES COTEMPORANEOUS COUNTEREXAMPLE COUNTERPARTIES COUNTERPLANNED COUNTERPLAYERS COUNTERPLEADED CRYMOTHERAPIES CRYPTAESTHESIA CRYPTAESTHETIC CRYPTESTHESIAS CURIETHERAPIES CYCLOPENTOLATE CYPROHEPTADINE DAGUERREOTYPED DAGUERREOTYPER DAGUERREOTYPES DECOMPENSATING DECOMPENSATION DECREPITATIONS DEPARTMENTALLY DEPHLEGMATIONS DEPIGMENTATION DEPRECIATINGLY DESPIRITUALISE DESPIRITUALIZE DESPOTICALNESS DESPOTOCRACIES DEXAMPHETAMINE DIAPHANOMETERS DISPARAGEMENTS DISPENSATIVELY DISPENSATORIES DISPUTABLENESS DISRESPECTABLE DISSIPATEDNESS DISTEMPERATURE DRAPEABILITIES ECOCATASTROPHE ECTYPOGRAPHIES ELECTROGRAPHIC ELECTROPLATERS ELECTROPLATING ELECTROTHERAPY ELLIPTICALNESS EMPATHETICALLY EMPHATICALNESS EMPYREUMATICAL EMPYREUMATISED EMPYREUMATISES EMPYREUMATIZED EMPYREUMATIZES ENANTIOPATHIES ENANTIOTROPIES ENCEPHALITIDES ENCEPHALITISES ENCEPHALITOGEN ENCEPHALOPATHY ENCOMPASSMENTS ENCYCLOPAEDIST ENDOPEPTIDASES ENHYPOSTATISED ENHYPOSTATISES ENHYPOSTATIZED ENHYPOSTATIZES ENTEROPNEUSTAL EPEXEGETICALLY EPHEMERALITIES EPHEMEROPTERAN EPICONTINENTAL EPIGENETICALLY EPIGRAMMATISED EPIGRAMMATISER EPIGRAMMATISES EPIGRAMMATIZED EPIGRAMMATIZER EPIGRAMMATIZES EPITHELIALISED EPITHELIALISES EPITHELIALIZED EPITHELIALIZES EPITHELISATION EPITHELIZATION EPITRACHELIONS EQUIPONDERATED EQUIPONDERATES EQUIPOTENTIALS EXASPERATINGLY EXCEPTIONALISM EXCEPTIONALIST EXCEPTIONALITY EXOPHTHALMOSES EXOPHTHALMUSES EXPECTORATIONS EXPECTORATIVES EXPEDIENTIALLY EXPERIENTIALLY EXPERIMENTALLY EXPLOITATIVELY EXPONENTIATION EXTEMPORANEITY EXTEMPORANEOUS EXTRACORPOREAL FERROPRUSSIATE FLIPPANTNESSES FOOTPLATEWOMEN GALACTOPOIESES GALEOPITHECINE GALEOPITHECOID GENTLEMANSHIPS HAEMATOPOIESES HAEMATOPOIESIS HAEMATOPOIETIC HEADMASTERSHIP HELIOTHERAPIES HEPATECTOMISED HEPATECTOMIZED HEPATICOLOGIES HEPATOCELLULAR HEPATOMEGALIES HEPATOPANCREAS HEPHTHEMIMERAL HERMAPHRODITES HERPETOLOGICAL HETEROGRAPHIES HETEROPLASTIES HETEROPOLARITY HOSPITABLENESS HYDROTHERAPIES HYMENOPLASTIES HYPERACIDITIES HYPERACUTENESS HYPERAESTHESIA HYPERAESTHESIC HYPERAESTHETIC HYPERALERTNESS HYPERCATALEXES HYPERCATALEXIS HYPERDACTYLIES HYPEREMOTIONAL HYPERESTHESIAS HYPEREXCITABLE HYPERIRRITABLE HYPERKERATOSES HYPERKERATOSIS HYPERKERATOTIC HYPERMETABOLIC HYPERMETROPIAS HYPERNATRAEMIA HYPERPARASITES HYPERREALISTIC HYPERREALITIES HYPERSEXUALITY HYPERSTIMULATE HYPERVENTILATE HYPNOTHERAPIES IMPENETRATIONS IMPERATIVENESS IMPERMEABILITY IMPLEMENTATION INAPPOSITENESS INAPPRECIATIVE INEXPECTANCIES INEXPECTATIONS INTERCOMPANIES INTERCORPORATE INTEROPERATING INTEROPERATIVE INTERPELLATING INTERPELLATION INTERPELLATORS INTERPENETRANT INTERPENETRATE INTERPERMEATED INTERPERMEATES INTERPILASTERS INTERPLANETARY INTERPRETATING INTERPRETATION INTERPRETATIVE INTERPUNCTUATE KAPELLMEISTERS KERATOPLASTIES LEPTOCEPHALOUS LETTERSPACINGS LEUCOCYTOPENIA LEUKOCYTOPENIA LICENTIATESHIP LIEUTENANTSHIP MAGNETOSPHERES MAGNETOSPHERIC MALAPERTNESSES MALDEPLOYMENTS MASSOTHERAPIES MECHANOTHERAPY MERCAPTOPURINE MESATICEPHALIC METABISULPHITE METALLOGRAPHER METAPHOSPHATES METAPHYSICISED METAPHYSICISES METAPHYSICIZED METAPHYSICIZES METEMPIRICALLY METENCEPHALONS METEOROGRAPHIC METOCLOPRAMIDE MICROPEGMATITE MISAPPRECIATED MISAPPRECIATES MULTIPARAMETER NONACCEPTANCES NONCOOPERATIVE NONSPECULATIVE NONTHERAPEUTIC OBSTREPERATING OESOPHAGITISES ONOMATOPOIESES OPHTHALMOMETER ORTHOCEPHALIES OVERCAPACITIES OVERCAPITALISE OVERCAPITALIZE OVERCOMPENSATE OVERCOMPLICATE OVERSPECULATED OVERSPECULATES PALAEETHNOLOGY PALAEOBOTANIES PALAEOCLIMATES PALAEOCURRENTS PALAEOMAGNETIC PALATIALNESSES PALEOECOLOGIST PALEOMAGNETISM PALEOMAGNETIST PALEONTOLOGIES PALINGENESISTS PALINGENETICAL PAMPHLETEERING PANAESTHETISMS PANCREATECTOMY PANCREATITIDES PANCREATITISES PANGENETICALLY PANRADIOMETERS PANSEXUALITIES PANTALOONERIES PARAMETERISING PARAMETERIZING PARENTHESISING PARENTHESIZING PARTHENOSPORES PARTRIDGEBERRY PASSEMENTERIES PASSIONATENESS PASTORALNESSES PATELLECTOMIES PATHLESSNESSES PATULOUSNESSES PECTINESTERASE PEDANTOCRACIES PEDESTRIANISED PEDESTRIANISES PEDESTRIANISMS PEDESTRIANIZED PEDESTRIANIZES PELLETISATIONS PELLETIZATIONS PENEPLANATIONS PENETRABLENESS PENITENTIARIES PENNATULACEOUS PENTADACTYLIES PENTAVALENCIES PENTOBARBITONE PERCEIVABILITY PERCUTANEOUSLY PEREGRINATIONS PERENNIALITIES PERFECTABILITY PERFECTIBILIAN PERFECTIONATED PERFECTIONATES PERFORMATIVELY PERICARDITIDES PERICARDITISES PERIMETRICALLY PERINATOLOGIES PERIPATETICISM PERISSODACTYLE PERMEABILITIES PERMUTABLENESS PERPETUALITIES PERSEVERATIONS PERSPICACITIES PERTURBATORIES PESTILENTIALLY PETROCHEMICALS PHENETHYLAMINE PHENMETRAZINES PHENOBARBITONE PHENOMENALISTS PHENOTHIAZINES PHENYLBUTAZONE PHENYLTHIOUREA PHLEGMATICNESS PHOTOENGRAVERS PHOTOTELEGRAMS PHOTOTELEGRAPH PHOTOTHERAPIES PHYTOGENETICAL PHYTOTHERAPIES PIEZOMAGNETISM PINEALECTOMIES PINEALECTOMISE PINEALECTOMIZE PITIABLENESSES PLACENTOLOGIES PLASTERINESSES PLEASANTNESSES PLENIPOTENTIAL PNEUMATICITIES PNEUMATOLOGIES PNEUMATOMETERS PNEUMATOPHORES PNEUMOTHORACES PNEUMOTHORAXES POETICALNESSES POLYBUTADIENES POLYEMBRYONATE POSSESSIONATES POSTADOLESCENT POSTCOLLEGIATE POSTEROLATERAL POSTTREATMENTS POTENTIALITIES PRAISEWORTHIER PREADOLESCENTS PREANAESTHETIC PREARRANGEMENT PRECEDENTIALLY PRECIPITANCIES PREDESIGNATING PREDESIGNATION PREDESIGNATORY PREDESTINARIAN PREDESTINATING PREDESTINATION PREDESTINATIVE PREDESTINATORS PREDETERMINATE PREDEVALUATION PREESTABLISHED PREESTABLISHES PREFERENTIALLY PREGNABILITIES PREMANUFACTURE PREMEDICATIONS PREMEDITATEDLY PREMEDITATIONS PREMENSTRUALLY PRENEGOTIATING PRENEGOTIATION PREOPERATIONAL PREOPERATIVELY PREORDAINMENTS PREPONDERANTLY PREPONDERATELY PREPONDERATING PREPONDERATION PRESBYTERIALLY PRESENTABILITY PRESENTATIONAL PRESENTIMENTAL PRESERVABILITY PRESERVATORIES PRESIDENTIALLY PRETERMINATION PREVENTABILITY PROCELEUSMATIC PROFESSORIATES PROFITABLENESS PROLETARIANISE PROLETARIANIZE PROPAEDEUTICAL PROTRACTEDNESS PROTUBERANCIES PROVEABILITIES PSEUDAESTHESIA PSEUDARTHROSES PSEUDOPREGNANT PYRIMETHAMINES QUINQUEPARTITE RADIOTELEGRAPH RADIOTELEPHONE RADIOTELEPHONY RADIOTELETYPES RADIOTHERAPIES RAMAPITHECINES RAPPROCHEMENTS REALPOLITIKERS REAPPOINTMENTS REAPPRAISEMENT REAPPROPRIATED REAPPROPRIATES RECAPITULATIVE REEXPLORATIONS REEXPORTATIONS REFLECTOGRAPHS REFLECTOGRAPHY REHOSPITALISED REHOSPITALISES REHOSPITALIZED REHOSPITALIZES REINCORPORATED REINCORPORATES REPARABILITIES REPHOTOGRAPHED REPLACEABILITY REPRESENTAMENS REPRESENTATION REPRESENTATIVE REPUTABILITIES REPUTATIONLESS RESPECTABILISE RESPECTABILITY RESPECTABILIZE RESPIRITUALISE RESPIRITUALIZE ROENTGENOGRAPH ROENTGENOPAQUE SECRETARYSHIPS SELENOGRAPHIST SEMIELLIPTICAL SEPARABILITIES SEPARATENESSES SEPARATIVENESS SEPTUAGENARIAN SEPTUAGENARIES SESQUIPEDALITY SPECTRALNESSES SPELAEOLOGISTS SPERMATOGENIES SPERMATOGENOUS SPERMATOPHORES SPERMATOPHYTES SPERMATORRHEAS SPERMATORRHOEA SPERMATOTHECAE SPERMATOTHECAS SPHERICALITIES SPIROCHAETOSES STAPEDECTOMIES STEEPLECHASERS STEEPLECHASING STEGANOGRAPHER STEGOCEPHALIAN STEGOCEPHALOUS STEPPARENTINGS STEREOGRAPHIES STEREOGRAPHING STEREOSCOPICAL STREPTOKINASES SUBDEPARTMENTS SUBSPECIALTIES SUBTHERAPEUTIC SULPHACETAMIDE SULPHONMETHANE SUPERABILITIES SUPERABSORBENT SUPERCELESTIAL SUPERDAINTIEST SUPERDELEGATES SUPERELEVATING SUPERELEVATION SUPEREROGATING SUPEREROGATION SUPEREROGATIVE SUPEREROGATORS SUPEREROGATORY SUPERESSENTIAL SUPERFETATIONS SUPERFOETATION SUPERGRAVITIES SUPERINSULATED SUPERORDINATED SUPERORDINATES SUPERPARTICLES SUPERPHOSPHATE SUPERQUALITIES SUPERSATURATED SUPERSATURATES SUPERSEXUALITY SUPERSPECTACLE SUPERSTIMULATE SUPERTERRANEAN SUPPLEMENTALLY SUPRASEGMENTAL SUSPERCOLLATED SUSPERCOLLATES TECHNOGRAPHIES TELENCEPHALONS TELEPATHICALLY TELEPHONICALLY TELEPHOTOGRAPH TELEPORTATIONS TELESCOPICALLY TEMPERAMENTFUL TEMPORALNESSES TEMPTABILITIES TENDINOPATHIES TENDONOPATHIES TEREPHTHALATES THERMOGRAPHERS THERMOGRAPHIES TOPOISOMERASES TRACHEOSCOPIES TRACHYPTERUSES TRANSPARENCIES TRANSPARENTISE TRANSPARENTIZE TRAPEZOHEDRONS TREASURERSHIPS TREPONEMATOSES TREPONEMATOSIS TRIPHENYLAMINE ULTRACOMPETENT ULTRACREPIDATE ULTRAEXPENSIVE UNAPPRECIATIVE UNCONTEMPLATED UNDERPOPULATED UNDERSTRAPPERS UNPLEASANTNESS UNPLEASANTRIES UNPOETICALNESS UNPREDICTABLES UNPREMEDITABLE UNPREMEDITATED UNRECAPTURABLE UNRECIPROCATED UNRESPECTABLES UNSPLINTERABLE VITUPERATIVELY WAFFLESTOMPERS WATERPROOFNESS WEATHERPERSONS WEATHERPROOFED XANTHOPTERINES