There are 596 fourteen-letter words containing A, C, E, P and T, https://www.bestwordlist.com/c/a/5/14letterwordswithacept.htm ACCEPTABLENESS ACCEPTILATIONS ACCOMPANIMENTS ACCOMPLISHMENT ACETAMINOPHENS ACTINOMORPHIES ALPHABETICALLY ANTHROPOMETRIC ANTICENSORSHIP ANTICIPATIVELY ANTIEPILEPTICS ANTINEOPLASTIC ANTINEPHRITICS ANTIPATHETICAL ANTIREPUBLICAN ANTISEPTICALLY ANTISEPTICISED ANTISEPTICISES ANTISEPTICISMS ANTISEPTICIZED ANTISEPTICIZES APERIODICITIES APODEICTICALLY APOLOGETICALLY APOPHLEGMATICS APOPHTHEGMATIC APOPLECTICALLY APOSEMATICALLY APOSTOLICITIES APOTHEGMATICAL APPENDECTOMIES APPENDICECTOMY APPENDICITISES APPERTAINANCES APPRECIATIVELY APPRECIATORILY APPRENTICEHOOD APPRENTICEMENT APPRENTICESHIP ARCHETYPICALLY ARCHPRIESTHOOD ARCHPRIESTSHIP ARTERIOGRAPHIC ASSOCIATESHIPS ASTHENOSPHERIC ASTROCOMPASSES BACTERIOPHAGES BACTERIOPHAGIC BRACHYPTERISMS CALCIPOTRIENES CAMPYLOBACTERS CANDIDATESHIPS CAPELLMEISTERS CAPTIOUSNESSES CARPETBAGGINGS CARPOMETACARPI CATALEPTICALLY CATECHUMENSHIP CATHODOGRAPHER CENTRIPETALISM CENTUPLICATING CENTUPLICATION CEPHALISATIONS CEPHALIZATIONS CEPHALOMETRIES CHARTERPARTIES CHARTOGRAPHERS CHARTOGRAPHIES CHEMAUTOTROPHS CHEMOAUTOTROPH CHEMOTHERAPIES CHEMOTHERAPIST CHIEFTAINSHIPS CHRISTOPHANIES CHROMATOPHORES CHROMATOSPHERE CINEMATOGRAPHS CINEMATOGRAPHY CLAPTRAPPERIES CLAUSTROPHOBES COMETOGRAPHIES COMPARTMENTING COMPASSIONATED COMPASSIONATES COMPATIBLENESS COMPENSABILITY COMPENSATIONAL COMPLEMENTALLY COMPUTERISABLE COMPUTERIZABLE COMPUTERPHOBIA CONCEPTUALISED CONCEPTUALISER CONCEPTUALISES CONCEPTUALISMS CONCEPTUALISTS CONCEPTUALIZED CONCEPTUALIZER CONCEPTUALIZES CONSTABLESHIPS CONTAINERPORTS CONTAINERSHIPS CONTEMPERATION CONTEMPERATURE CONTEMPLATIONS CONTEMPLATISTS CONTEMPLATIVES CONTEMPORANEAN CONTEMPORARIES CONTEMPORARILY CONTRACEPTIONS CONTRACEPTIVES CONTRAPOSITIVE CONVERTAPLANES CONVERTIPLANES CONVERTOPLANES COOPERATIONIST COPARTNERSHIPS CORPOREALITIES COTEMPORANEOUS COTRANSPORTERS COUNTEREXAMPLE COUNTERPARTIES COUNTERPLANNED COUNTERPLAYERS COUNTERPLAYING COUNTERPLEADED CRYMOTHERAPIES CRYOPROTECTANT CRYPTAESTHESIA CRYPTAESTHETIC CRYPTESTHESIAS CRYPTOGRAPHERS CRYPTOGRAPHIES CURIETHERAPIES CYCLOPENTOLATE CYPROHEPTADINE CYTOPATHOGENIC DACTYLOGRAPHER DACTYLOSCOPIES DECAPITALISING DECAPITALIZING DECAPSULATIONS DECOMPENSATING DECOMPENSATION DECREPITATIONS DEDUPLICATIONS DEPRECIATINGLY DERMATOGLYPHIC DERMATOGRAPHIC DERMATOPLASTIC DESPOTICALNESS DESPOTOCRACIES DIAHELIOTROPIC DIPTEROCARPOUS DISCAPACITATED DISCAPACITATES DISCEPTATORIAL DISINCORPORATE DISRESPECTABLE DODECAPHONISTS ECOCATASTROPHE ECTYPOGRAPHIES EDRIOPHTHALMIC ELECTROGRAPHIC ELECTROPLATERS ELECTROPLATING ELECTROTHERAPY ELLIPTICALNESS EMPATHETICALLY EMPHATICALNESS EMPYREUMATICAL ENANTIOMORPHIC ENCAPSULATIONS ENCEPHALITIDES ENCEPHALITISES ENCEPHALITOGEN ENCEPHALOPATHY ENCOMPASSMENTS ENCYCLOPAEDIST ENDOCRINOPATHY ENDOPHYTICALLY EPEXEGETICALLY EPICONTINENTAL EPIGENETICALLY EPIGRAMMATICAL EPITRACHELIONS ERGASTOPLASMIC ETHNOGRAPHICAL EUPHUISTICALLY EUTROPHICATION EXCEPTIONALISM EXCEPTIONALIST EXCEPTIONALITY EXPANSIONISTIC EXPECTORATIONS EXPECTORATIVES EXTRACORPOREAL FRACTOGRAPHIES GALACTOPOIESES GALACTOPOIESIS GALACTOPOIETIC GALEOPITHECINE GALEOPITHECOID GEOPOLITICALLY GEOPOLITICIANS HAEMATOPOIETIC HEPATECTOMISED HEPATECTOMIZED HEPATICOLOGIES HEPATICOLOGIST HEPATOCELLULAR HEPATOPANCREAS HEPATOTOXICITY HERMAPHRODITIC HERPETOLOGICAL HYDROPNEUMATIC HYETOGRAPHICAL HYPERACIDITIES HYPERACUTENESS HYPERAESTHESIC HYPERAESTHETIC HYPERBATICALLY HYPERCATABOLIC HYPERCATALEXES HYPERCATALEXIS HYPERDACTYLIES HYPEREXCITABLE HYPERKERATOTIC HYPERMETABOLIC HYPERPARASITIC HYPERREALISTIC HYPERROMANTICS HYPERSARCOMATA HYPERTROPHICAL HYPOTHECATIONS HYPOTHETICALLY ICHTHYOPHAGIES IMPEACHABILITY IMPROVISATRICE INAPPRECIATION INAPPRECIATIVE INCAPABILITIES INCORPOREALITY INEXPECTANCIES INEXPECTATIONS INTERCOMPANIES INTERCOMPARING INTERCORPORATE INTERPAROCHIAL INTERPUNCTUATE ISENTROPICALLY ISOPIESTICALLY KERATINOPHILIC LEPTOCEPHALOUS LEPTODACTYLOUS LETTERSPACINGS LEUCOCYTOPENIA LEUKOCYTOPENIA LEXICOGRAPHIST LICENTIATESHIP MAGNETOSPHERIC MECHANOTHERAPY MERCAPTOPURINE MESATICEPHALIC METACOMPUTINGS METALLOGRAPHIC METAPHORICALLY METAPHOSPHORIC METAPHRASTICAL METAPHYSICALLY METAPHYSICIANS METAPHYSICISED METAPHYSICISES METAPHYSICISTS METAPHYSICIZED METAPHYSICIZES METAPSYCHOLOGY METEMPIRICALLY METENCEPHALONS METEOROGRAPHIC METOCLOPRAMIDE METOPOSCOPICAL METROPOLITICAL MICROPARASITES MICROPARTICLES MICROPEGMATITE MISACCEPTATION MISAPPRECIATED MISAPPRECIATES MULTICUSPIDATE MULTIPARTICLES MULTIPLICATIVE MUNICIPALITIES NANOCOMPOSITES NEOCAPITALISMS NEOCAPITALISTS NEOPLASTICISMS NEOPLASTICISTS NONACCEPTANCES NONCOMPLICATED NONCOOPERATION NONCOOPERATIVE NONCOOPERATORS NONSPECIALISTS NONSPECTACULAR NONSPECULATIVE NONTHERAPEUTIC OPHTHALMOSCOPE OPISTHOCOELIAN ORTHOCEPHALIES ORTHOCEPHALOUS ORTHOPEDICALLY OVERCAPACITIES OVERCAPITALISE OVERCAPITALIZE OVERCOMPENSATE OVERCOMPLICATE OVERPARTICULAR OVERSPECULATED OVERSPECULATES PACHYDERMATOUS PAEDIATRICIANS PALAEANTHROPIC PALAEOCLIMATES PALAEOCLIMATIC PALAEOCURRENTS PALAEOMAGNETIC PALEOBOTANICAL PALEOECOLOGIST PALINGENETICAL PANCREATECTOMY PANCREATITIDES PANCREATITISES PANGENETICALLY PANTISOCRACIES PARAMETRICALLY PARCHMENTISING PARCHMENTIZING PARENCHYMATOUS PAROCHIALITIES PARTHENOCARPIC PARTICLEBOARDS PARTICULARISED PARTICULARISER PARTICULARISES PARTICULARIZED PARTICULARIZER PARTICULARIZES PARTICULARNESS PARTURIFACIENT PATELLECTOMIES PECTINESTERASE PEDANTOCRACIES PEDUNCULATIONS PENICILLATIONS PENNATULACEOUS PENTADACTYLIES PENTADACTYLISM PENTADACTYLOUS PENTAVALENCIES PEPTIDOGLYCANS PERCEIVABILITY PERCUTANEOUSLY PERFECTABILITY PERFECTIBILIAN PERFECTIONATED PERFECTIONATES PERICARDITIDES PERICARDITISES PERIMETRICALLY PERIODICALISTS PERIPATETICISM PERIPHRASTICAL PERISSODACTYLE PERISSODACTYLS PERLOCUTIONARY PERSCRUTATIONS PERSPICACITIES PERTINACIOUSLY PETRIFICATIONS PETROCHEMICALS PETROGRAPHICAL PETROLOGICALLY PHALLOCENTRISM PHARMACEUTICAL PHARMACEUTISTS PHARMACOPOEIST PHELLOPLASTICS PHENOTYPICALLY PHILATELICALLY PHLEGMATICALLY PHLEGMATICNESS PHLOGISTICATED PHLOGISTICATES PHONEMATICALLY PHOSPHOCREATIN PHOTOCATALYSES PHOTODUPLICATE PHOTOGENICALLY PHOTOREACTIONS PHOTOREALISTIC PHTHALOCYANINE PHYLLOSILICATE PHYTOCHEMICALS PHYTOGENETICAL PINEALECTOMIES PINEALECTOMISE PINEALECTOMIZE PITHECANTHROPI PLACENTOLOGIES PLANETOLOGICAL PLATINOCYANIDE PLATYCEPHALOUS PLEBIFICATIONS PLECTOGNATHOUS PLEONASTICALLY PLUVIOMETRICAL PNEUMATICITIES PNEUMOGASTRICS PNEUMOTHORACES POCOCURANTEISM POETICALNESSES POLYCARBONATES POLYCYTHAEMIAS POLYTHEISTICAL PORTULACACEOUS POSTADOLESCENT POSTAPOCALYPSE POSTCOLLEGIATE POSTDOCTORATES POSTMASTECTOMY PRACTICALITIES PREACQUAINTING PREACQUISITION PREADOLESCENTS PREANAESTHETIC PRECEDENTIALLY PRECIPITANCIES PRECIPITATIONS PRECONISATIONS PRECONIZATIONS PRECONSONANTAL PRECONTRACTING PREDICTABILITY PREFABRICATING PREFABRICATION PREFABRICATORS PREJUDICATIONS PREMANUFACTURE PREMEDICATIONS PREOCCUPATIONS PREPUBLICATION PRESANCTIFYING PRESYMPTOMATIC PRETTIFICATION PREUNIFICATION PREVARICATIONS PRINCIPALITIES PROCELEUSMATIC PROCESSABILITY PROCRASTINATED PROCRASTINATES PROGNOSTICATED PROGNOSTICATES PROJECTISATION PROJECTIZATION PRONUCLEARISTS PRONUNCIAMENTO PROPAEDEUTICAL PROSTHETICALLY PROTOCHORDATES PROTRACTEDNESS PROTUBERANCIES PROVENTRICULAR PSYCHASTHENIAS PSYCHASTHENICS PSYCHOMETRICAL PTERIDOLOGICAL PTERYLOGRAPHIC PUNDITOCRACIES PYROMETRICALLY PYROTECHNICIAN QUADRUPLICATED QUADRUPLICATES QUASIPARTICLES QUINTUPLICATED QUINTUPLICATES RAMAPITHECINES RAPPROCHEMENTS REAPPLICATIONS RECAPITALISING RECAPITALIZING RECAPITULATING RECAPITULATION RECAPITULATIVE RECAPITULATORY RECIPROCATIONS RECOMPILATIONS RECOMPUTATIONS REDUPLICATIONS REFLECTOGRAPHS REFLECTOGRAPHY REINCORPORATED REINCORPORATES REPLACEABILITY REPUBLICATIONS REPUNCTUATIONS RESPECTABILISE RESPECTABILITY RESPECTABILIZE SCINTIGRAPHIES SCINTILLASCOPE SCISSIPARITIES SECRETARYSHIPS SEMIELLIPTICAL SEXTUPLICATING SIMPLIFICATIVE SPECIALISATION SPECIALIZATION SPECIFICATIONS SPECTACULARITY SPECTATORSHIPS SPECTRALNESSES SPECTROGRAPHIC SPECTROLOGICAL SPERMATOPHYTIC SPERMATOTHECAE SPERMATOTHECAS SPHAEROCRYSTAL SPHERICALITIES SPINTHARISCOPE SPIROCHAETOSES SPIROCHAETOSIS SPIRONOLACTONE STAPEDECTOMIES STEEPLECHASERS STEEPLECHASING STEGANOGRAPHIC STEGOCEPHALIAN STEGOCEPHALOUS STENOGRAPHICAL STEREOSCOPICAL STREPTOBACILLI SUBATMOSPHERIC SUBSPECIALISTS SUBSPECIALTIES SUBTHERAPEUTIC SULPHACETAMIDE SUPERCELESTIAL SUPERFICIALITY SUPERPARTICLES SUPERPATRIOTIC SUPERSPECTACLE SUSPERCOLLATED SUSPERCOLLATES SYCOPHANTLIEST TACHISTOSCOPES TECHNOGRAPHIES TECHNOPOLITANS TELAUTOGRAPHIC TELENCEPHALONS TELEPATHICALLY TELEPHONICALLY TELESCOPICALLY THEOSOPHICALLY THERIANTHROPIC THERMOPLASTICS THERMOSCOPICAL TRACHEOSCOPIES TRACHYPTERUSES TRANSCRIPTASES TRANSCRIPTOMES TRANSPARENCIES TRANSPLACENTAL TRANSPORTANCES TROPOCOLLAGENS ULTRACOMPETENT ULTRACREPIDATE ULTRAPRECISION UNAPPRECIATION UNAPPRECIATIVE UNCONTEMPLATED UNCONTEMPORARY UNEMPHATICALLY UNINCORPORATED UNMETAPHORICAL UNMETAPHYSICAL UNPEDANTICALLY UNPOETICALNESS UNPREDICTABLES UNRECAPTURABLE UNRECIPROCATED UNRESPECTABLES UNSOPHISTICATE XEROPHYTICALLY