There are 534 twelve-letter words containing 2A, E, P and R, https://www.bestwordlist.com/c/a/5/12letterwordswithaaepr.htm
ABSORPTANCES ACAROPHILIES ACCOMPANIERS ACHAENOCARPS AEROGRAPHIES
AEROPLANKTON AFTERPARTIES ALDERMANSHIP ALEXIPHARMIC ALPHABETISER
ALPHABETIZER ALPHAMERICAL ALPHANUMERIC AMATEURSHIPS AMPELOGRAPHY
AMPHITHEATER AMPHITHEATRE ANAMORPHOSES ANEMOGRAPHIC ANGIOSPERMAL
ANTEPRANDIAL ANTIPARALLEL ANTIPARTICLE ANTIPLEASURE ANTIPREDATOR
APITHERAPIES APLANOSPORES APOTHECARIES APPARELMENTS APPARENTNESS
APPARTEMENTS APPENDICULAR APPERTAINING APPOGGIATURE APPRAISEMENT
APPRAISIVELY APPRECIATING APPRECIATION APPRECIATIVE APPRECIATORS
APPRECIATORY APPROACHABLE APPROPRIABLE APPROPRIATED APPROPRIATES
APPROXIMATED APPROXIMATES APPURTENANCE APPURTENANTS ARACHNOPHOBE
ARCHESPORIAL ARCHETYPALLY ARCHETYPICAL ARCHIPELAGIC ARCHIPELAGOS
AREOGRAPHIES AROMATHERAPY ARPEGGIATING ARPEGGIATION ARSPHENAMINE
ARTOCARPUSES ASPARAGINASE ASPERGATIONS AUTOGRAPHIES AUTOSAMPLERS
AZATHIOPRINE AZOOSPERMIAS BACKSLAPPERS BICARPELLARY BIPARENTALLY
BRACHYCEPHAL BREASTPLATES CACOGRAPHERS CACOGRAPHIES CALLIGRAPHED
CALLIGRAPHER CAMELEOPARDS CAMERAPERSON CAMERAPHONES CAMPANOLOGER
CANCERPHOBIA CAPERCAILLIE CAPERCAILZIE CAPITULARIES CARDIOPLEGIA
CARDSHARPERS CARPENTARIAS CARPETBAGGED CARPETBAGGER CARTOGRAPHER
CATAPHORESES CATAPHORESIS CATAPHORETIC CATAPULTIERS CATASTROPHES
CATCHPHRASES CATERPILLARS CERAMOGRAPHY CERATOPSIANS CERAUNOGRAPH
CHAPERONAGES CHAPLAINRIES CHARTERPARTY CLAMJAMPHRIE CLAPPERBOARD
CLAPPERCLAWS CLAPTRAPPERY COMPARATIVES COMPEARANCES CRAPEHANGERS
CRAPEHANGING DEASPIRATING DEASPIRATION DECAPITATORS DEEPWATERMAN
DEPARTMENTAL DEPAUPERATED DEPAUPERATES DEPRAVATIONS DERMAPLANING
DERMAPTERANS DEUTERANOPIA DICARPELLARY DISAPPEARING DRAPEABILITY
DYSPAREUNIAS ECTOPARASITE EMANCIPATORS EMANCIPATORY EMPARADISING
EMPARLAUNCES ENDOPARASITE ENTOPLASTRAL EPIGRAMMATIC EPIGRAPHICAL
EPISTOLARIAN EQUIPARATING EQUIPARATION ERGASTOPLASM EVAPORATIONS
EVAPOROGRAPH EXASPERATERS EXASPERATING EXASPERATION EXASPERATIVE
EXASPERATORS EXOPARASITES EXOPARASITIC EXPANSIONARY EXPATRIATING
EXPATRIATION EXPATRIATISM EXTRAHEPATIC EXTRAPOLATED EXTRAPOLATES
EXTRAPOLATOR FLANNELGRAPH FLASHPACKERS FLUORAPATITE GEOGRAPHICAL
GLASSPAPERED GRADUATESHIP GRANDPAPPIES GRANDPARENTS GRAPHICACIES
GREASEPAINTS HAGIOGRAPHER HANDICAPPERS HARUSPICATED HARUSPICATES
HEMERALOPIAS HEMIPARASITE HERPETOFAUNA HETEROPLASIA HOLOPARASITE
HYDNOCARPATE HYPERALGESIA HYPERAROUSAL HYPERCAPNIAS HYPERCARBIAS
HYPERPHAGIAS HYPERPLASIAS HYPERSARCOMA HYPERSPATIAL HYPONATREMIA
IAMBOGRAPHER IMPERATORIAL INAPPARENTLY INCOMPARABLE INSEPARABLES
INTERSPATIAL IRREPAIRABLE IRREPEALABLE IRREPEALABLY JAPONAISERIE
KERATOPLASTY KERAUNOGRAPH LAMPADEDROMY LAPAROSCOPES LAPAROTOMIES
LAUREATESHIP MACROCEPHALY MADREPORIANS MAGNETOGRAPH MALAPERTNESS
MALPRACTICES MANAGERSHIPS MANSPLAINERS MANSPREADERS MANSPREADING
MARIMBAPHONE MARKETPLACES MARPRELATING MASSOTHERAPY MEPROBAMATES
METACARPUSES METAPHORICAL METAPHRASING METAPHRASTIC MORPHALLAXES
NANOPARTICLE NAPRAPATHIES NEWSPAPERMAN NONPARALLELS NONREPAYABLE
OCEANOGRAPHY OPERATICALLY OVERCAPACITY OVERPACKAGED OVERPACKAGES
PACHYDERMIAS PADDLEBOARDS PAEDERASTIES PAEDIATRISTS PALAEOGRAPHY
PALAESTRICAL PALATOVELARS PALEOGRAPHER PALEOGRAPHIC PALPEBRATING
PALSGRAVINES PANCREATITIS PANSPERMATIC PANTALOONERY PANTOGRAPHER
PAPERBACKERS PAPERBACKING PAPERHANGERS PAPERHANGING PAPERMAKINGS
PAPPARDELLES PARABLEPSIES PARACENTESES PARACENTESIS PARACETAMOLS
PARACYANOGEN PARADOXURINE PARAENETICAL PARAESTHESIA PARAESTHETIC
PARAFFINIEST PARAGENESIAS PARAGLOSSATE PARAGRAPHERS PARAHYDROGEN
PARALANGUAGE PARALDEHYDES PARALIPOMENA PARALLELINGS PARALLELISED
PARALLELISES PARALLELISMS PARALLELISTS PARALLELIZED PARALLELIZES
PARALLELLING PARALLELWISE PARAMAGNETIC PARAMEDICALS PARAMENSTRUA
PARAMETERISE PARAMETERIZE PARAMETRICAL PARAMETRISED PARAMETRISES
PARAMETRIZED PARAMETRIZES PARAMORPHINE PARAMOUNCIES PARANTHELION
PARAPENTINGS PARAPERIODIC PARAPHIMOSES PARAPHRASERS PARAPHRENIAS
PARAPLANNERS PARAPOPHYSES PARAPRAXISES PARAQUADRATE PARARESCUERS
PARASCENDERS PARASCENDING PARASCIENCES PARASITAEMIA PARASITICIDE
PARASPHENOID PARASTICHIES PARASUICIDES PARASYNAPSES PARASYNTHETA
PARATHORMONE PARATROOPERS PARENCEPHALA PARENCHYMATA PARENTERALLY
PARESTHESIAS PARFOCALISED PARFOCALISES PARFOCALIZED PARFOCALIZES
PAROCHIALISE PAROCHIALIZE PARONOMASIES PARTIALITIES PARTICIPABLE
PARTICIPATED PARTICIPATES PARTICULATES PARVIFOLIATE PASIGRAPHIES
PASQUINADERS PASSAGEWORKS PASSEMEASURE PASSIONARIES PASTEURELLAE
PASTEURELLAS PASTORALNESS PASTURELANDS PATERNALISMS PATERNALISTS
PATHBREAKING PATRIALITIES PATRIARCHATE PATRIARCHIES PATRILINEAGE
PEDANTOCRACY PEDANTOCRATS PEDIATRICIAN PEDICELLARIA PENTAHYDRATE
PENTARCHICAL PERAMBULATED PERAMBULATES PERAMBULATOR PERICHAETIAL
PERMANGANATE PERORATIONAL PESCATARIANS PESCETARIANS PHANEROGAMIC
PHANTASTRIES PHARMACEUTIC PHARMACOPEIA PHEASANTRIES PHENARSAZINE
PHRASEMAKERS PHRASEMAKING PHRASEOGRAMS PHRASEOGRAPH PLAGIARISERS
PLAGIARIZERS PLANETARIUMS PLANTIGRADES PLASTERBOARD PLASTICWARES
PLATEMARKING PLEASANTRIES POMEGRANATES PORTMANTEAUS PORTMANTEAUX
POSTGRADUATE PRAGMATISERS PRAGMATIZERS PREACQUAINTS PREAMBULATED
PREAMBULATES PREAPPROVALS PREARRANGING PREASSURANCE PREBREAKFAST
PRECAUTIONAL PRECLASSICAL PRECLEARANCE PREECLAMPSIA PREFABRICATE
PREINAUGURAL PRELAPSARIAN PRELATICALLY PREMALIGNANT PREMARITALLY
PREMAXILLARY PREPACKAGING PREPARATIONS PREPARATIVES PREREHEARSAL
PREVARICATED PREVARICATES PREVARICATOR PROCARBAZINE PROCATHEDRAL
PROCELLARIAN PROGRAMMABLE PROLETARIANS PROLETARIATE PROLETARIATS
PROPAGANDISE PROPAGANDIZE PROSTANTHERA PROTONEMATAL PSEUDOSCALAR
PTERIDOMANIA PTEROSAURIAN PYROGALLATES PYROTARTRATE QUADRAPLEGIA
QUADRAPLEGIC QUADRIPLEGIA RACTOPAMINES RADIOGRAPHED RADIOGRAPHER
RADIOTHERAPY RAMPAGEOUSLY REACCEPTANCE READAPTATION REAPPARELING
REAPPARELLED REAPPEARANCE REAPPRAISALS REAPPRAISERS REAPPRAISING
RECAPITALISE RECAPITALIZE RECAPITULATE RECEPTACULAR RELANDSCAPED
RELANDSCAPES REPAGINATING REPAGINATION REPARABILITY REPATRIATING
REPATRIATION REPATRIATORS REPLANTATION REPROACHABLE REPROACHABLY
REPUTATIONAL RHAMPHOTHECA RHOPALOCERAL SALTPETREMAN SANDPAPERIER
SANDPAPERING SAPROLEGNIAS SCRAPERBOARD SCRATCHPLATE SEMAPHORICAL
SEMIPARASITE SEPARABILITY SEPARATENESS SEPARATISTIC SEPARATIVELY
SEPARATORIES SEPARATRICES SEPTILATERAL SEPTUAGENARY SERAPHICALLY
SPACEFARINGS SPACEWALKERS SPARAGRASSES SPEARCARRIER SPEARHEADING
SPECTACULARS SPECTATORIAL SPERMATHECAE SPERMATHECAL SPERMATHECAS
SPERMATOZOAL SPERMATOZOAN SPIROCHAETAL SPREADEAGLED STANDPATTERS
STEGANOGRAPH STRAPHANGERS STRATOPAUSES SULFORAPHANE SUPERANNUATE
SUPERBAZAARS SUPERGLACIAL SUPERNACULAR SUPERNATANTS SUPERNATURAL
SUPRAMUNDANE TACHYGRAPHER TAPSALTEERIE TERATOPHOBIA TETRAPLEGIAS
TETRAPOLITAN THAUMATROPES TRAGELAPHINE TRANSALPINES TRANSPARENCE
TRANSPARENCY TRANSPIRABLE TRANSPLANTED TRANSPLANTER TRANSPOSABLE
TRAPEZOHEDRA TREPANATIONS TROPHALLAXES TRYPAFLAVINE TRYPARSAMIDE
UNAPPARELLED UNAPPROACHED UNCAPTURABLE UNPARALLELED UNPARDONABLE
UNPLEASANTRY UNPRELATICAL UNREPAIRABLE UNREPEALABLE UNREPEATABLE
UNREPEATABLY URANOGRAPHER WALLPAPERING WATERMANSHIP