There are 408 fifteen-letter words containing A, C, P, R and T, https://www.bestwordlist.com/c/a/5/15letterwordswithacprt.htm ACHONDROPLASTIC ACROPARESTHESIA ACTINOTHERAPIES ALLOTRIOMORPHIC AMPHITHEATRICAL ANISOTROPICALLY ANTAPHRODISIACS ANTHROPOCENTRIC ANTHROPOGENETIC ANTHROPOLOGICAL ANTHROPOMORPHIC ANTHROPOPHOBICS ANTHROPOPSYCHIC ANTIAPHRODISIAC ANTIPERISTALTIC ANTIREPUBLICANS APPRENTICEHOODS APPRENTICEMENTS APPRENTICESHIPS APPROACHABILITY ARCHAEOPTERYXES ARCHIEPISCOPATE ARCHPRIESTHOODS ARCHPRIESTSHIPS ASTROPHYSICALLY ASTROPHYSICISTS ATMOSPHERICALLY AUTOGRAPHICALLY AUTOMORPHICALLY AUTOTROPHICALLY BACTERIOPHAGIES BACTERIOPHAGOUS BATRACHOPHOBIAS BRACHYTHERAPIES CARPETBAGGERIES CARPOMETACARPUS CASTANOSPERMINE CATHODOGRAPHERS CATHODOGRAPHIES CENTRIPETALISMS CEPHALOCHORDATE CEPHALOTHORACES CEPHALOTHORACIC CEPHALOTHORAXES CHALCOGRAPHISTS CHARTOGRAPHICAL CHEMAUTOTROPHIC CHEMOAUTOTROPHS CHEMOAUTOTROPHY CHEMOPSYCHIATRY CHEMOTHERAPISTS CHEMOTROPICALLY CHROMATOGRAPHED CHROMATOGRAPHER CHROMATOGRAPHIC CHROMATOPHOROUS CHROMATOSPHERES CHROMOTHERAPIES CHRONOTHERAPIES CINEMATOGRAPHED CINEMATOGRAPHER CINEMATOGRAPHIC CLAUSTROPHILIAS CLAUSTROPHOBIAS CLIMATOGRAPHIES COMPARABILITIES COMPARATIVENESS COMPARTMENTALLY COMPLEMENTARIES COMPLEMENTARILY COMPLEMENTARITY COMPLIMENTARILY COMPUTERISATION COMPUTERIZATION COMPUTERPHOBIAS CONCEPTUALISERS CONCEPTUALIZERS CONSERVATORSHIP CONSPIRATRESSES CONTEMPERATIONS CONTEMPERATURES CONTEMPORANEANS CONTEMPORANEITY CONTEMPORANEOUS CONTRAPOSITIONS CONTRAPOSITIVES CONTRAPROPELLER CONTRAPUNTALIST COOPERATIONISTS COOPERATIVENESS COOPERATIVITIES CORPORATENESSES CORPORATIZATION CORPORIFICATION COUNTERADAPTIVE COUNTERCAMPAIGN COUNTEREXAMPLES COUNTERPLANNING COUNTERPLEADING COUNTERPROPOSAL CROSSOPTERYGIAN CRYOPRECIPITATE CRYOPROTECTANTS CRYPTAESTHESIAS CRYPTANALYTICAL CRYPTOGRAPHICAL CRYPTOGRAPHISTS CRYSTALLOGRAPHY CYPROHEPTADINES DACTYLOGRAPHERS DACTYLOGRAPHIES DECIPHERABILITY DERMATOGLYPHICS DIASTROPHICALLY DISINCORPORATED DISINCORPORATES ECOCATASTROPHES ELECTROGRAPHIES ELECTROMYOGRAPH ELECTROPLATINGS ELECTROPORATION ENDOCRINOPATHIC EUTROPHICATIONS GEOSTROPHICALLY GLYPTOGRAPHICAL GRAVIPERCEPTION HARPSICHORDISTS HELIOTROPICALLY HETEROGRAPHICAL HISTORIOGRAPHIC HYDROPATHICALLY HYDROTROPICALLY HYPERACTIVITIES HYPERCATABOLISM HYPERCATALECTIC HYPERCRITICALLY HYPERFUNCTIONAL HYPERMETROPICAL HYPERREACTIVITY HYPOCHONDRIASTS HYPOCRYSTALLINE HYPSOMETRICALLY IMPRACTICALNESS IMPROVISATRICES IMPROVVISATRICE INAPPRECIATIONS INCOMPARABILITY INTERCOMPARISON INTERPERCEPTUAL INTERPROVINCIAL INTERPUNCTUATED INTERPUNCTUATES INTROSPECTIONAL ISOPERIMETRICAL KINEMATOGRAPHIC LARYNGOSCOPISTS LEXICOGRAPHISTS LOPHOBRANCHIATE LYMPHOSARCOMATA MACROPHOTOGRAPH MACROPRUDENTIAL MALACOPTERYGIAN MALPRACTITIONER MECHANORECEPTOR MEGACORPORATION MERCAPTOPURINES METAMORPHICALLY METOCLOPRAMIDES MICROPEGMATITES MICROPEGMATITIC MICROPHOTOGRAPH MICROPULSATIONS MISAPPRECIATING MISAPPRECIATION MISAPPRECIATIVE MUSICOTHERAPIES NEUROPATHICALLY NEUROPATHOLOGIC NEUROPLASTICITY NEUROPSYCHIATRY NONCONTEMPORARY NONCOOPERATIONS NONCOOPERATIVES NONMETAPHORICAL NONPARTICIPANTS NONPHOTOGRAPHIC NONPSYCHIATRIST NONSPECTACULARS ORTHOPAEDICALLY ORTHOPSYCHIATRY OVERAPPLICATION OVERCAPITALISED OVERCAPITALISES OVERCAPITALIZED OVERCAPITALIZES OVERCOMPENSATED OVERCOMPENSATES OVERCOMPLICATED OVERCOMPLICATES OVEREXPECTATION OVERSPECULATING OVERSPECULATION PALAEOANTHROPIC PANTISOCRATICAL PANTISOCRATISTS PANTOPRAGMATICS PARAGENETICALLY PARAHELIOTROPIC PARALINGUISTICS PARALLACTICALLY PARASITICALNESS PARASITOLOGICAL PARASYMPATHETIC PARENTHETICALLY PARTHENOCARPIES PARTHENOCARPOUS PARTHENOGENETIC PARTICIPATIONAL PARTICIPATORIES PARTICULARISERS PARTICULARISING PARTICULARISTIC PARTICULARITIES PARTICULARIZERS PARTICULARIZING PARTURIFACIENTS PATRIARCHALISMS PATRIFOCALITIES PECTINESTERASES PERFECTIBILIANS PERFECTIONATING PERGAMENTACEOUS PERIODONTICALLY PERIPATETICALLY PERIPATETICISMS PERISSODACTYLES PERISSODACTYLIC PERISTALTICALLY PERSONIFICATION PETROCHEMICALLY PHALLOCENTRISMS PHARMACEUTICALS PHARMACOGNOSIST PHARMACOGNOSTIC PHARMACOKINETIC PHARMACOLOGISTS PHARMACOPOEISTS PHARMACOPOLISTS PHARMACOTHERAPY PHILANTHROPICAL PHONAUTOGRAPHIC PHOSPHOCREATINE PHOSPHOCREATINS PHOTOELECTRICAL PHOTOGRAMMETRIC PHOTOMACROGRAPH PHOTOMETRICALLY PHOTOMICROGRAPH PHOTOREFRACTIVE PHOTOTROPICALLY PHOTOZINCOGRAPH PHYTOGEOGRAPHIC PICTORIALNESSES PIEZOMETRICALLY PISCICULTURALLY PITHECANTHROPUS PLANIMETRICALLY PLANOMETRICALLY PLURALISTICALLY PLUTOCRATICALLY POCOCURANTEISMS POLYCARBOXYLATE POLYCHLORINATED POLYCHROMATISMS POLYCRYSTALLINE POSTHEMORRHAGIC POSTSECONDARIES PRACTICABLENESS PRACTICALNESSES PRAGMATICALNESS PREACQUAINTANCE PREAGRICULTURAL PREANAESTHETICS PREANNOUNCEMENT PRECANCELLATION PRECIPITABILITY PRECIPITANTNESS PRECIPITATENESS PREDICABILITIES PREDICTABLENESS PREFABRICATIONS PREHISTORICALLY PREMANUFACTURED PREMANUFACTURES PREMODIFICATION PRENOTIFICATION PREPUBLICATIONS PRESYNAPTICALLY PRETTIFICATIONS PROBLEMATICALLY PROCELEUSMATICS PROCESSIONALIST PROCRASTINATING PROCRASTINATION PROCRASTINATIVE PROCRASTINATORS PROCRASTINATORY PROCREATIVENESS PROCURATORSHIPS PROGNOSTICATING PROGNOSTICATION PROGNOSTICATIVE PROGNOSTICATORS PROJECTISATIONS PROJECTIZATIONS PRONUNCIAMENTOS PRONUNCIATIONAL PROSENCHYMATOUS PROSTATECTOMIES PROTEOLYTICALLY PROTOCERATOPSES PROTOZOOLOGICAL PROVINCIALITIES PROVOCATIVENESS PSYCHIATRICALLY PSYCHOGERIATRIC PSYCHOHISTORIAN PSYCHOMETRICIAN PSYCHOTHERAPIES PSYCHOTHERAPIST PSYCHROMETRICAL PULMOBRANCHIATE PURITANICALNESS PYROTECHNICALLY PYROTECHNICIANS QUADRUPLICATING QUADRUPLICATION QUADRUPLICITIES RADICULOPATHIES RADIOPROTECTION RADIOPROTECTIVE RADIOTELEPHONIC RECAPITULATIONS RECHROMATOGRAPH RECIPROCALITIES RECONCEPTUALISE RECONCEPTUALIZE RECTIPETALITIES REDUPLICATIVELY REINCORPORATING REINCORPORATION REPLICABILITIES RESPECTABILISED RESPECTABILISES RESPECTABILIZED RESPECTABILIZES RESPECTABLENESS SAPROGENICITIES SAPROPHYTICALLY SCLEROTHERAPIES SPECTROGRAPHIES SPECTROSCOPICAL SPERMATOBLASTIC SPERMATOGENETIC SPHAEROCRYSTALS SPINTHARISCOPES SPIROCHAETAEMIA SPIRONOLACTONES STEREOGRAPHICAL STEREOTYPICALLY STRATIGRAPHICAL STRATOSPHERICAL STREPTOBACILLUS STREPTOCARPUSES SUPERACTIVITIES SUPERBUREAUCRAT SUPERORGANICIST SUPERPLASTICITY SUPERSPECIALIST SUPERSPECTACLES SUPERSTRUCTURAL SUSPERCOLLATING TELEGRAPHICALLY THALASSOGRAPHIC THERAPEUTICALLY THORACOPLASTIES TOPOGRAPHICALLY TRANSCRIPTIONAL TRANSCRIPTIVELY TROPICALISATION TROPICALIZATION TYPOGRAPHICALLY ULTRACREPIDATED ULTRACREPIDATES ULTRAMICROSCOPE ULTRAMICROSCOPY ULTRAPRECISIONS UNAPPRECIATIONS UNCOMPLIMENTARY UNCOOPERATIVELY UNCOPYRIGHTABLE UNDERCAPITALISE UNDERCAPITALIZE UNPATRIOTICALLY UNPRACTICALNESS UNPRACTISEDNESS UNSPECTACULARLY XYLOTYPOGRAPHIC