There are 593 fourteen-letter words containing A, C, P, S and T, https://www.bestwordlist.com/c/a/5/14letterwordswithacpst.htm
ACCEPTABLENESS ACCEPTILATIONS ACCOMPANIMENTS ACCOMPLISHMENT ACCOUNTANTSHIP
ACETAMINOPHENS ACHROMATOPSIAS ACTINOMORPHIES ACTINOMORPHOUS ACUPUNCTURINGS
ACUPUNCTURISTS AMPLIFICATIONS ANTAPHRODISIAC ANTHROPOSOPHIC ANTICAPITALISM
ANTICAPITALIST ANTICENSORSHIP ANTIEPILEPTICS ANTINEOPLASTIC ANTINEPHRITICS
ANTIPARASITICS ANTIPHLOGISTIC ANTIPHRASTICAL ANTIPSYCHIATRY ANTIPSYCHOTICS
ANTISCRIPTURAL ANTISEPTICALLY ANTISEPTICISED ANTISEPTICISES ANTISEPTICISMS
ANTISEPTICIZED ANTISEPTICIZES ANTISPASMODICS ANTISYPHILITIC APERIODICITIES
APHORISTICALLY APOCALYPTICISM APOCHROMATISMS APOPHLEGMATICS APOSEMATICALLY
APOSTOLICITIES APPENDECTOMIES APPENDICITISES APPERTAINANCES APPRENTICESHIP
ARCHPRIESTHOOD ARCHPRIESTSHIP ASSOCIATESHIPS ASTHENOSPHERIC ASTROCOMPASSES
ASTROPHYSICIST ASYMPTOTICALLY BACTERIOPHAGES BRACHYPTERISMS BRONCHOSPASTIC
CALCIPOTRIENES CALLIGRAPHISTS CAMPANOLOGISTS CAMPYLOBACTERS CAMPYLOTROPOUS
CANDIDATESHIPS CAPELLMEISTERS CAPITALISATION CAPRIFICATIONS CAPTIOUSNESSES
CARPETBAGGINGS CATASTROPHISMS CATASTROPHISTS CATECHUMENSHIP CENTRIPETALISM
CEPHALISATIONS CEPHALIZATIONS CEPHALOMETRIES CHALCOGRAPHIST CHAPTALISATION
CHARTERPARTIES CHARTOGRAPHERS CHARTOGRAPHIES CHEMAUTOTROPHS CHEMOTHERAPIES
CHEMOTHERAPIST CHIEFTAINSHIPS CHIROGRAPHISTS CHRISTOPHANIES CHROMATOGRAPHS
CHROMATOPHORES CHROMATOSPHERE CINEMATOGRAPHS CLAPTRAPPERIES CLAUSTROPHILIA
CLAUSTROPHOBES CLAUSTROPHOBIA CLAUSTROPHOBIC COADJUTORSHIPS COCONSPIRATORS
COLLAPSABILITY COLLAPSIBILITY COMETOGRAPHIES COMMANDANTSHIP COMPAGINATIONS
COMPARATIVISTS COMPASSIONATED COMPASSIONATES COMPATIBLENESS COMPATRIOTISMS
COMPENSABILITY COMPENSATIONAL COMPUTERISABLE CONCEPTUALISED CONCEPTUALISER
CONCEPTUALISES CONCEPTUALISMS CONCEPTUALISTS CONCEPTUALIZES CONSCRIPTIONAL
CONSPIRATIONAL CONSPIRATORIAL CONSPURCATIONS CONSTABLESHIPS CONSTUPRATIONS
CONSULTANTSHIP CONTAINERPORTS CONTAINERSHIPS CONTEMPLATIONS CONTEMPLATISTS
CONTEMPLATIVES CONTEMPORARIES CONTRACEPTIONS CONTRACEPTIVES CONTRAPOSITION
CONTRAPOSITIVE CONTRAPUNTISTS CONVERTAPLANES CONVERTIPLANES CONVERTOPLANES
COOPERATIONIST COPARTNERSHIPS CORPORATIVISMS CORPOREALITIES CORPUSCULARITY
COSMOGRAPHISTS COSMOPOLITICAL COTEMPORANEOUS COTRANSPORTERS COTRANSPORTING
COUNTERPARTIES COUNTERPLAYERS CRAFTSMANSHIPS CRANIOSCOPISTS CRYMOTHERAPIES
CRYPTAESTHESIA CRYPTAESTHETIC CRYPTESTHESIAS CRYPTOGRAPHERS CRYPTOGRAPHIES
CRYPTOGRAPHIST CRYPTOSPORIDIA CURIETHERAPIES CUSTODIANSHIPS DACTYLOSCOPIES
DECAPITALISING DECAPSULATIONS DECOMPENSATING DECOMPENSATION DECREPITATIONS
DEDUPLICATIONS DERMATOPLASTIC DESPOTICALNESS DESPOTOCRACIES DIPTEROCARPOUS
DISAPPLICATION DISCAPACITATED DISCAPACITATES DISCEPTATORIAL DISCIPLINARITY
DISCORPORATING DISINCORPORATE DISRESPECTABLE DODECAPHONISTS ECOCATASTROPHE
ECTYPOGRAPHIES ELECTROPLATERS ELLIPTICALNESS EMPHATICALNESS ENCAPSULATIONS
ENCEPHALITIDES ENCEPHALITISES ENCOMPASSMENTS ENCYCLOPAEDIST EPITRACHELIONS
ERGASTOPLASMIC EUPHUISTICALLY EXCEPTIONALISM EXCEPTIONALIST EXPANSIONISTIC
EXPECTORATIONS EXPECTORATIVES FRACTOGRAPHIES GALACTOPHOROUS GALACTOPOIESES
GALACTOPOIESIS GALVANOPLASTIC GASTROSCOPISTS GEOPOLITICIANS HARPSICHORDIST
HARUSPICATIONS HEPATECTOMISED HEPATICOLOGIES HEPATICOLOGIST HEPATOPANCREAS
HYPERACIDITIES HYPERACUTENESS HYPERAESTHESIC HYPERAESTHETIC HYPERCATALEXES
HYPERCATALEXIS HYPERDACTYLIES HYPERPARASITIC HYPERREALISTIC HYPERROMANTICS
HYPERSARCOMATA HYPOCHONDRIAST HYPOCORISTICAL HYPONASTICALLY HYPOSTATICALLY
HYPOTHECATIONS ICHTHYOPHAGIES ICHTHYOPHAGIST ICHTHYOPHAGOUS ICHTHYOPSIDANS
IMPROVISATRICE INCAPABILITIES INCAPSULATIONS INCORPORATIONS INDUPLICATIONS
INEXPECTANCIES INEXPECTATIONS INTERCOMPANIES ISENTROPICALLY ISOPIESTICALLY
JUSTICIARSHIPS LAPAROSCOPISTS LARYNGOSCOPIST LEPTOCEPHALOUS LEPTODACTYLOUS
LETTERSPACINGS LEXICOGRAPHIST LICENTIATESHIP LYCANTHROPISTS MAGNETOSPHERIC
MESATICEPHALIC METACOMPUTINGS METAPHOSPHORIC METAPHRASTICAL METAPHYSICALLY
METAPHYSICIANS METAPHYSICISED METAPHYSICISES METAPHYSICISTS METAPHYSICIZED
METAPHYSICIZES METAPSYCHOLOGY METENCEPHALONS METOPOSCOPICAL MICROPARASITES
MICROPARASITIC MICROPARTICLES MICROPLANKTONS MICROPULSATION MISACCEPTATION
MISANTHROPICAL MISAPPLICATION MISAPPRECIATED MISAPPRECIATES MISCOMPUTATION
MISPUNCTUATING MISPUNCTUATION MULTICUSPIDATE MULTIPARTICLES MULTIPLICATORS
MUNICIPALITIES NANOCOMPOSITES NEOCAPITALISMS NEOCAPITALISTS NEOPLASTICISMS
NEOPLASTICISTS NONACCEPTANCES NONCAPITALISTS NONCOOPERATORS NONPOLITICIANS
NONPSYCHIATRIC NONSPECIALISTS NONSPECTACULAR NONSPECULATIVE ONYCHOPHAGISTS
OPHTHALMOSCOPE OPHTHALMOSCOPY OPISTHOBRANCHS OPISTHOCOELIAN OPISTHOGRAPHIC
OPSONIFICATION OPTIMISTICALLY ORTHOCEPHALIES ORTHOCEPHALOUS OVERCAPACITIES
OVERCAPITALISE OVERCOMPENSATE OVERSPECULATED OVERSPECULATES PACHYDACTYLOUS
PACHYDERMATOUS PACIFISTICALLY PAEDIATRICIANS PAGANISTICALLY PALAEOCLIMATES
PALAEOCURRENTS PALEOECOLOGIST PALMIFICATIONS PANCHROMATISMS PANCREATITIDES
PANCREATITISES PANDICULATIONS PANTISOCRACIES PANTISOCRATIST PARALINGUISTIC
PARAPHRASTICAL PARCHMENTISING PARENCHYMATOUS PAROCHIALITIES PARONOMASTICAL
PARTICIPATIONS PARTICLEBOARDS PARTICULARISED PARTICULARISER PARTICULARISES
PARTICULARISMS PARTICULARISTS PARTICULARIZES PARTICULARNESS PATELLECTOMIES
PATRIARCHALISM PECTINESTERASE PEDANTOCRACIES PEDUNCULATIONS PENICILLATIONS
PENNATULACEOUS PENTADACTYLIES PENTADACTYLISM PENTADACTYLOUS PENTAVALENCIES
PEPTIDOGLYCANS PERCUTANEOUSLY PERFECTIONATES PERICARDITIDES PERICARDITISES
PERIODICALISTS PERIPATETICISM PERIPHRASTICAL PERISSODACTYLE PERISSODACTYLS
PERSCRUTATIONS PERSPICACITIES PERTINACIOUSLY PETRIFICATIONS PETROCHEMICALS
PHALLOCENTRISM PHANTASMAGORIC PHANTASMICALLY PHARMACEUTISTS PHARMACOLOGIST
PHARMACOPOEIST PHARMACOPOLIST PHELLOPLASTICS PHLEGMATICNESS PHLOGISTICATED
PHLOGISTICATES PHOSPHOCREATIN PHOTOCATALYSES PHOTOCATALYSIS PHOTOREACTIONS
PHOTOREALISTIC PHTHALOCYANINS PHYLLOSILICATE PHYTOCHEMICALS PICTORIALISING
PICTURISATIONS PICTURIZATIONS PINEALECTOMIES PINEALECTOMISE PLACENTOLOGIES
PLASTICISATION PLASTICIZATION PLATYCEPHALOUS PLEBIFICATIONS PLECTOGNATHOUS
PLEONASTICALLY PNEUMATICITIES PNEUMOGASTRICS PNEUMOTHORACES POCOCURANTEISM
POCOCURANTISMS POCOCURANTISTS POETICALNESSES POLITICALISING POLITICISATION
POLLICITATIONS POLYCARBONATES POLYCHROMATISM POLYCYTHAEMIAS POLYDACTYLISMS
POLYTHEISTICAL PONTIFICATIONS PORNIFICATIONS PORTULACACEOUS POSTADOLESCENT
POSTAPOCALYPSE POSTCAPITALIST POSTCOLLEGIATE POSTCOPULATORY POSTDOCTORATES
POSTGANGLIONIC POSTMASTECTOMY POSTSURGICALLY PRACTICALITIES PREACQUISITION
PREADOLESCENTS PREANAESTHETIC PRECIPITANCIES PRECIPITATIONS PRECONISATIONS
PRECONIZATIONS PRECONSONANTAL PREFABRICATORS PREJUDICATIONS PREMEDICATIONS
PREOCCUPATIONS PRESANCTIFYING PRESYMPTOMATIC PREVARICATIONS PRINCIPALITIES
PROCELEUSMATIC PROCESSABILITY PROCRASTINATED PROCRASTINATES PROCRASTINATOR
PROCURATORSHIP PROGNOSTICATED PROGNOSTICATES PROGNOSTICATOR PROJECTISATION
PROLIFICATIONS PRONUCLEARISTS PRONUNCIATIONS PROPAGANDISTIC PROSTHETICALLY
PROTOACTINIUMS PROTOCHORDATES PROTOPLASMATIC PROTRACTEDNESS PROTUBERANCIES
PROVINCIALISTS PSYCHASTHENIAS PSYCHASTHENICS PSYCHOACOUSTIC PSYCHOANALYSTS
PSYCHOANALYTIC PSYCHODRAMATIC PSYCHOMETRICAL PSYCHOPATHISTS PSYCHOSOMATICS
PUGILISTICALLY PUNCTUATIONIST PUNDITOCRACIES PURCHASABILITY PUTRIFICATIONS
QUADRUPLICATES QUASIPARTICLES QUINTUPLICATES RAMAPITHECINES RAPPROCHEMENTS
REAPPLICATIONS RECAPITALISING RECIPROCATIONS RECOMPILATIONS RECOMPUTATIONS
REDUPLICATIONS REFLECTOGRAPHS REINCORPORATES REPUBLICATIONS REPUNCTUATIONS
RESPECTABILISE RESPECTABILITY RESPECTABILIZE SAPONIFICATION SCINTIGRAPHIES
SCINTILLASCOPE SCISSIPARITIES SCRIPTURALISMS SCRIPTURALISTS SECRETARYSHIPS
SEMIELLIPTICAL SEXTUPLICATING SIMPLIFICATION SIMPLIFICATIVE SIMPLIFICATORS
SIMPLISTICALLY SOCIOPOLITICAL SOPHISTICATING SOPHISTICATION SOPHISTICATORS
SPECIALISATION SPECIALIZATION SPECIFICATIONS SPECTACULARITY SPECTATORSHIPS
SPECTRALNESSES SPECTROGRAPHIC SPECTROLOGICAL SPERMATOPHYTIC SPERMATOTHECAE
SPERMATOTHECAS SPHAEROCRYSTAL SPHERICALITIES SPIFFLICATIONS SPINTHARISCOPE
SPIRITUALISTIC SPIROCHAETOSES SPIROCHAETOSIS SPIRONOLACTONE SPONGIOBLASTIC
STAPEDECTOMIES STAPHYLOCOCCAL STAPHYLOCOCCIC STAPHYLOCOCCUS STEEPLECHASERS
STEEPLECHASING STEGANOGRAPHIC STEGOCEPHALIAN STEGOCEPHALOUS STENOGRAPHICAL
STEREOSCOPICAL STREPTOBACILLI STROBOSCOPICAL STYLOGRAPHICAL SUBATMOSPHERIC
SUBSPECIALISTS SUBSPECIALTIES SUBTHERAPEUTIC SULPHACETAMIDE SUPERCELESTIAL
SUPERFICIALITY SUPERPARTICLES SUPERPATRIOTIC SUPERSPECTACLE SUPPLICATINGLY
SUSPERCOLLATED SUSPERCOLLATES SYCOPHANTISHLY SYCOPHANTISING SYCOPHANTIZING
SYCOPHANTLIEST SYMPATHOLYTICS SYPHILITICALLY TACHISTOSCOPES TACHISTOSCOPIC
TACHYGRAPHISTS TECHNOGRAPHIES TECHNOPOLITANS TELENCEPHALONS TELESCOPICALLY
THEOSOPHICALLY THERMOPLASTICS THERMOSCOPICAL THROMBOPLASTIC TRACHEOSCOPIES
TRACHYPTERUSES TRANSCRIPTASES TRANSCRIPTIONS TRANSCRIPTOMES TRANSPARENCIES
TRANSPICUOUSLY TRANSPLACENTAL TRANSPORTANCES TROPOCOLLAGENS ULTRAPRECISION
UNMETAPHYSICAL UNPOETICALNESS UNPREDICTABLES UNRESPECTABLES UNSCRIPTURALLY
UNSOPHISTICATE YACHTSMANSHIPS YUPPIFICATIONS