There are 616 nine-letter words containing A, C, P and T, https://www.bestwordlist.com/c/a/4/9letterwordswithacpt.htm
ACCEPTANT ACCEPTEES ACCEPTERS ACCEPTING ACCEPTIVE ACCEPTORS ACCIPITER
ACCOMPTED ACROPETAL ACTINOPOD ACUPOINTS ADIPOCYTE ADSCRIPTS AFTERCLAP
ALIPHATIC ALLOTYPIC AMETROPIC ANALEPTIC ANAPESTIC ANCIPITAL ANTHOCARP
ANTHROPIC ANTIPYICS ANTITYPIC APATHETIC APHANITIC APHERETIC APICULATE
APLANATIC APLANETIC APNEUSTIC APOCOPATE APODICTIC APOMICTIC APOPHATIC
APOPTOTIC APOSTATIC APOSTOLIC APOTHECES APOTHECIA APPETENCE APPETENCY
APPLECART APPLICANT APPLICATE APRICATED APRICATES ARCHETYPE ARCHITYPE
ARCTOPHIL ASPECTING ASPECTUAL ASPHALTIC ATTERCOPS AUSPICATE AUTOCARPS
AUTOSCOPY AUTOTYPIC BACKDROPT BACKPLATE BACKSPLIT BACKSTAMP BACKSTOPS
BACKSTRAP BACKSWEPT BECARPETS BEPATCHED BETATOPIC BICIPITAL BLACKSPOT
BLACKTIPS BLACKTOPS BRATPACKS CACHEPOTS CACOTOPIA CADETSHIP CALIPHATE
CALOTYPES CALTHROPS CALYPTERA CALYPTERS CALYPTRAS CAMPANIST CAMPCRAFT
CAMPSHIRT CAMPSITES CAMPSTOOL CANTALOUP CANTRAIPS CAPABLEST CAPACITOR
CAPELLETS CAPITALLY CAPITANOS CAPITATED CAPITATES CAPITAYNS CAPITELLA
CAPITULAR CAPITULUM CAPONATAS CAPOTASTO CAPOTTING CAPROATES CAPRYLATE
CAPSTONES CAPSULATE CAPTAINCY CAPTAINED CAPTAINRY CAPTIONED CAPTIVATE
CAPTIVING CAPTIVITY CAPTOPRIL CAPTURERS CAPTURING CARPENTER CARPENTRY
CARPETBAG CARPETING CARROTTOP CARTOPPER CASHPOINT CATALEPSY CATAPHORA
CATAPHORS CATAPHYLL CATAPLASM CATAPLEXY CATAPULTS CATCHPOLE CATCHPOLL
CATHEPSIN CATHEPTIC CATNAPERS CATNAPPED CATNAPPER CATOPTRIC CENOTAPHS
CEPHALATE CHAETOPOD CHALKPITS CHAMPARTS CHAMPERTY CHAMPIEST CHAPATIES
CHAPATTIS CHAPITERS CHAPLETED CHAPPATIS CHAPPIEST CHAPSTICK CHAPTERAL
CHAPTERED CHAPTRELS CHASEPORT CHASSEPOT CHEAPSHOT CHINSTRAP CHIPOLATA
CHUPATTIS CHUTZPAHS CISPLATIN CITYSCAPE CLAPTRAPS CLEOPATRA CLODPATED
CLODPATES COADAPTED COCAPTAIN COMPACTED COMPACTER COMPACTLY COMPACTOR
COMPARTED COMPLAINT COMPLEATS COMPLIANT COMPTABLE COMPUTANT CONEPATES
CONEPATLS COOPERATE COPACETIC COPARENTS COPARTNER COPASETIC COPASTORS
COPATAINE COPATRIOT COPATRONS COPAYMENT COPEMATES COPULATED COPULATES
COPYTAKER CORPORATE CORPOSANT CRACKPOTS CRAMPIEST CRAPPIEST CRAPSHOOT
CRAPULENT CREPITANT CREPITATE CRISPATED CROREPATI CRYPTADIA CRYPTICAL
CRYPTOGAM CULPATORY CUPOLATED CUSPIDATE CYANOTYPE CYCLEPATH CYSTOCARP
CYTOPATHY CYTOPENIA CYTOPLASM CYTOPLAST DEATHCUPS DEPRECATE DIAPYETIC
DIATROPIC DUMPCARTS DUPLICATE ECLAMPTIC ECOTOPIAS ECTOPLASM EMPACKETS
EMPAESTIC EMPHATICS EMPLASTIC EPAENETIC EPARCHATE EPICANTHI EPICENTRA
EPINASTIC EPISTATIC EPITAPHIC EPITHECAE ESCAPISTS ETHERCAPS ETTERCAPS
EUCALYPTI EUCALYPTS EUPLASTIC EXCEPTANT EXCULPATE EXPECTANT EXPISCATE
EXPLICATE FACEPLANT FACEPLATE FACEPRINT FLAPTRACK FLATPACKS FLATPICKS
FLIPCHART FLOPTICAL FOOTPACES FORCIPATE GRAPHITIC HAPLONTIC HEPATICAE
HEPATICAL HEPATICAS HEPTARCHS HEPTARCHY HYPOCAUST HYPOTHECA IMPACTERS
IMPACTFUL IMPACTING IMPACTION IMPACTITE IMPACTIVE IMPACTORS IMPECCANT
IMPLICATE IMPRECATE INCHTAPES INCOMPACT INCULPATE JOCKSTRAP KICKPLATE
KOPASETIC LOCOPLANT LYMPHATIC MANCIPATE MAPSTICKS MATCHPLAY MEATSPACE
MERCAPTAN METACARPI MULTIPACK MYOPATHIC NIGHTCAPS NONIMPACT NUNCUPATE
NYCTALOPE NYCTALOPS OCCIPITAL OCCUPANTS OCCUPATED OCCUPATES OCTAPLOID
OCTAPODIC OCTOPODAN OMPHACITE OPACITIES OPERATICS OPTICALLY OPTICIANS
OUTCAPERS OUTPACING OUTPLACED OUTPLACER OUTPLACES OUTPREACH PACATIONS
PACHYTENE PACIFISTS PACKCLOTH PACKETING PACKETISE PACKETIZE PACKSHEET
PACKSTAFF PACTIONAL PACTIONED PAEDEUTIC PAIDEUTIC PAITRICKS PANCETTAS
PANCHAYAT PANCRATIA PANCRATIC PANMICTIC PANOISTIC PANSTICKS PANTROPIC
PANZOOTIC PARACHUTE PARACLETE PARALYTIC PARASITIC PARATONIC PARCHMENT
PAROTITIC PARTICLES PARURETIC PASTANCES PASTICCIO PASTICHES PATCHABLE
PATCHIEST PATCHINGS PATCHOCKE PATCHOULI PATCHOULY PATCHWORK PATENCIES
PATERCOVE PATHETICS PATIENCES PATRIARCH PATRICIAN PATRICIDE PATRICOES
PATRIOTIC PATRISTIC PAUCITIES PEACETIME PEACHIEST PEARLITIC PECCANTLY
PECTINALS PECTINATE PECTINEAL PECTORALS PECULATED PECULATES PECULATOR
PEDIATRIC PEIRASTIC PENCHANTS PENCRAFTS PENTACLES PENTANOIC PENTARCHS
PENTARCHY PERCENTAL PERCOLATE PERFECTAS PERITRACK PETALODIC PETECHIAE
PETECHIAL PETTICOAT PETULANCE PETULANCY PHACOLITE PHACOLITH PHAGOCYTE
PHENACITE PHLYCTENA PHOTOCALL PHOTOCARD PHOTOSCAN PHYLACTIC PIANISTIC
PICKTHANK PICTARNIE PICTOGRAM PICTORIAL PICTURALS PIRACETAM PIRATICAL
PISCATORS PISCATORY PISCATRIX PISTACHES PISTACHIO PITTANCES PIZZICATI
PIZZICATO PLACATERS PLACATING PLACATION PLACATIVE PLACATORY PLACCATES
PLACEMATS PLACEMENT PLACENTAE PLACENTAL PLACENTAS PLACIDEST PLACIDITY
PLACITORY PLANCHETS PLASMATIC PLASTICKY PLASTICLY PLATONICS PLAYACTED
PLAYACTOR PLICATELY PLICATING PLICATION PLICATURE PLUTOCRAT PNEUMATIC
POACHIEST PODCASTED PODCASTER PODIATRIC POETICALS POLITICAL PONTIANAC
POPTASTIC PORCHETTA PORTANCES PORTAPACK PORTULACA POSTCARDS POSTCAVAE
POSTCAVAL POSTCAVAS POSTCRASH POSTFACES POTHECARY POTLACHES PRACTICAL
PRACTICED PRACTICER PRACTICES PRACTICKS PRACTICUM PRACTIQUE PRACTISED
PRACTISER PRACTISES PRACTOLOL PRAEFECTS PRAELECTS PRAGMATIC PREACTING
PREATOMIC PRECARIAT PRECATIVE PRECATORY PRECOITAL PREDACITY PREDICANT
PREDICATE PREENACTS PRELOCATE PRERECTAL PRISMATIC PROACTION PROACTIVE
PROCACITY PROCREANT PROCREATE PROCTODEA PROLACTIN PROSTATIC PROTRACTS
PROVOCANT PSAMMITIC PSORIATIC PTOMAINIC PUGNACITY PUMICATED PUMICATES
PUNCTATED PUNCTATOR PUNCTUATE PURITANIC PUSHCARTS PUSSYCATS PYRACANTH
PYRITICAL PYROCLAST RACEPATHS REACCEPTS RECAPTION RECAPTORS RECAPTURE
RECARPETS RECOMPACT REPATCHED REPATCHES REPLICANT REPLICATE RETROPACK
RHAPONTIC SARCOPTIC SAUCEPOTS SCAPEGOAT SCAPEMENT SCAPOLITE SCARPETTI
SCARPETTO SCEPTICAL SCOPULATE SCOTOPIAS SCRAPEGUT SIMPATICO SINCIPITA
SKEPTICAL SKETCHPAD SLAPSTICK SOCIOPATH SOFTSCAPE SPACEPORT SPACESUIT
SPACETIME SPARTICLE SPASMATIC SPECIALTY SPECIATED SPECIATES SPECTACLE
SPECTATED SPECTATES SPECTATOR SPECULATE SPERMATIC SPICCATOS SPICULATE
SPLATCHED SPLATCHES SPORTANCE SPORTCOAT STENOPAIC STOPWATCH STROUPACH
STYPTICAL SULPHATIC SUPPLICAT SWEPTBACK SYCOPHANT SYMPATICO SYMPATRIC
SYNCOPATE TACHYPNEA TAILPIECE TAPACOLOS TAPACULOS TAPPICING TEACUPFUL
TIECLASPS TOPICALLY TOUCHPADS TOWNSCAPE TRACKPADS TRAPROCKS TRIPTYCAS
TROPICALS TYMPANICS TYPECASES TYPECASTS TYPEFACES TYPICALLY UNPATCHED
UNTYPICAL UPAITHRIC UPCASTING UPCATCHES USUCAPTED VITASCOPE WHITECAPS