There are 419 fourteen-letter words containing 2A, E, P and R, https://www.bestwordlist.com/c/a/5/14letterwordswithaaepr.htm
AEROHYDROPLANE ALEXIPHARMAKON ALLOTETRAPLOID ALPHABETARIANS ALPHAMERICALLY
ALPHANUMERICAL AMPELOGRAPHIES AMPHIARTHROSES ANAMORPHOSCOPE ANDROCEPHALOUS
ANISOMETROPIAS ANTIDEPRESSANT ANTIPERISTASES ANTIPERISTASIS ANTIPERSPIRANT
ANTIREPUBLICAN ANTISEPARATIST APOCRYPHALNESS APPARENTNESSES APPERTAINANCES
APPERTAINMENTS APPRECIATIVELY APPRECIATORILY APPROPINQUATED APPROPINQUATES
ARCHETYPICALLY ARCHIEPISCOPAL AROMATHERAPIES AROMATHERAPIST ARTERIOGRAPHIC
ARTHROGRAPHIES ARTHROPLASTIES ASTROCOMPASSES AUTOBIOGRAPHER AUTOTETRAPLOID
BACTERIOPHAGES BACTERIOPHAGIC BANDSPREADINGS BLEPHAROPLASTS BLEPHAROPLASTY
BLEPHAROSPASMS BRACHYCEPHALIC BRACHYGRAPHIES CAESAROPAPISMS CAMPYLOBACTERS
CANCEROPHOBIAS CAPPARIDACEOUS CARBAMAZEPINES CARDIOGRAPHERS CARDIOGRAPHIES
CARPETBAGGINGS CARPOMETACARPI CATHODOGRAPHER CERAMOGRAPHIES CHALCOGRAPHERS
CHALCOGRAPHIES CHARTERPARTIES CHARTOGRAPHERS CHARTOGRAPHIES CINEMATOGRAPHS
CINEMATOGRAPHY CLAPPERCLAWERS CLAPPERCLAWING CLAPTRAPPERIES COMPARABLENESS
CONTEMPORANEAN CONVERTAPLANES CRYPTAESTHESIA DACTYLOGRAPHER DEPARTMENTALLY
DEPOLARISATION DEPOLARIZATION DERMATOGRAPHIA DERMATOGRAPHIC DERMATOPLASTIC
DIAPHANOMETERS DISAPPARELLING DISAPPEARANCES DISAPPROBATIVE DISAPPROPRIATE
DISCEPTATORIAL DISPARAGEMENTS DRAPEABILITIES ECOCATASTROPHE EMPYREUMATICAL
ENCEPHALOGRAMS ENCEPHALOGRAPH ENDOPARASITISM ENIGMATOGRAPHY EPIGRAMMATICAL
EPIGRAMMATISED EPIGRAMMATISER EPIGRAMMATISES EPIGRAMMATISMS EPIGRAMMATISTS
EPIGRAMMATIZED EPIGRAMMATIZER EPIGRAMMATIZES EPIGRAPHICALLY ERGASTOPLASMIC
ETHNOGRAPHICAL EXASPERATINGLY EXTRACORPOREAL EXTRAPOLATIONS EXTRAPYRAMIDAL
FLUNITRAZEPAMS FRACTOGRAPHIES GASTROPLASTIES GEOGRAPHICALLY HEADMASTERSHIP
HELIOGRAPHICAL HEPARINISATION HEPARINIZATION HEPATOCELLULAR HEPATOPANCREAS
HIEROGRAPHICAL HYDROXYAPATITE HYETOGRAPHICAL HYPERAESTHESIA HYPERAWARENESS
HYPERBARICALLY HYPERBATICALLY HYPERCALCAEMIA HYPERCALCAEMIC HYPERCALCEMIAS
HYPERCATABOLIC HYPERCATALEXES HYPERCATALEXIS HYPERGLYCAEMIA HYPERNATRAEMIA
HYPERPARASITES HYPERPARASITIC HYPERSARCOMATA HYPERURICAEMIA HYPONATRAEMIAS
IMPARIDIGITATE IMPARTIALITIES IMPERATORIALLY IMPONDERABILIA INAPPRECIATION
INAPPRECIATIVE INAPPROACHABLE INSEPARABILITY INTERPAROCHIAL INTERPLANETARY
INTERSPATIALLY IRREPARABILITY IRREPROACHABLE IRREPROACHABLY KERATOPLASTIES
KINEMATOGRAPHS KINEMATOGRAPHY LAMPADEDROMIES LAMPADEPHORIAS MACRENCEPHALIA
MACROCEPHALIAS MACROCEPHALIES MACROCEPHALOUS MAGISTRATESHIP MALAPERTNESSES
MALAPPORTIONED MALAPPROPRIATE MARCONIGRAPHED MASSOTHERAPIES MASSOTHERAPIST
MECHANOTHERAPY MEGASPORANGIUM METALLOGRAPHER METALLOGRAPHIC METAPHORICALLY
METAPHRASTICAL MICROPARASITES MISAPPRECIATED MISAPPRECIATES MISAPPROPRIATE
MONOCARPELLARY MULTIPARAMETER NASOPHARYNGEAL NEPHROBLASTOMA NEWSPAPERWOMAN
NONAPPEARANCES NONEXPLANATORY NONOPERATIONAL NONPOLARISABLE NONPOLARIZABLE
NONSPECTACULAR OCEANOGRAPHERS OCEANOGRAPHIES OPERATIONALISM OPERATIONALIST
ORGANOGRAPHIES OVERCAPACITIES OVERCAPITALISE OVERCAPITALIZE OVERPARTICULAR
PACHYDERMATOUS PAEDIATRICIANS PALAEANTHROPIC PALAEOCURRENTS PALAEOGRAPHERS
PALAEOGRAPHIES PALAEOGRAPHIST PALEOGEOGRAPHY PALEOGRAPHICAL PALMATIPARTITE
PANARTHRITISES PANCREATECTOMY PANCREATITIDES PANCREATITISES PANRADIOMETERS
PANSPERMATISMS PANSPERMATISTS PANTALOONERIES PANTISOCRACIES PAPAPRELATISTS
PARADOXOLOGIES PARAINFLUENZAS PARALEIPOMENON PARALLELEPIPED PARALLELOGRAMS
PARALLELOPIPED PARAMAGNETISMS PARAMENSTRUUMS PARAMETERISING PARAMETERIZING
PARAMETRICALLY PARAMILITARIES PARANTHROPUSES PARAROSANILINE PARASITOLOGIES
PARDONABLENESS PARENCHYMATOUS PARLIAMENTINGS PAROCHIALITIES PAROEMIOGRAPHY
PARTHENOCARPIC PARTICLEBOARDS PARTICULARISED PARTICULARISER PARTICULARISES
PARTICULARIZED PARTICULARIZER PARTICULARIZES PARTICULARNESS PARTURIFACIENT
PASTEURISATION PASTEURIZATION PASTORALNESSES PATRESFAMILIAS PAUPERISATIONS
PAUPERIZATIONS PEDANTOCRACIES PENTABARBITALS PENTOBARBITALS PERAMBULATIONS
PERIMENOPAUSAL PERIPHRASTICAL PERSUADABILITY PERTURBATIONAL PETROGRAPHICAL
PHALANSTERIANS PHALANSTERISMS PHALANSTERISTS PHARMACEUTICAL PHARMACEUTISTS
PHARMACOLOGIES PHARMACOPOEIAL PHARMACOPOEIAN PHARMACOPOEIAS PHARMACOPOEIST
PHENOBARBITALS PHRASEOGRAPHIC PHRASEOLOGICAL PINNATIPARTITE PLASMAPHERESES
PLASMAPHERESIS PLEASURABILITY PLESIOSAURIANS POLAROGRAPHIES POLYACRYLAMIDE
POLYCARBONATES POLYCARPELLARY POLYPHARMACIES POLYSACCHARIDE POLYSACCHAROSE
POLYUNSATURATE PORTULACACEOUS POSTEROLATERAL PRACTICALITIES PREACQUAINTING
PREADAPTATIONS PREANAESTHETIC PREARRANGEMENT PRECONSONANTAL PREDESTINARIAN
PREDEVALUATION PREFABRICATING PREFABRICATION PREFABRICATORS PREMANDIBULARS
PREMANUFACTURE PREMAXILLARIES PREMILLENARIAN PREOPERATIONAL PRESENTATIONAL
PREVARICATIONS PREVOCALICALLY PROBATIONARIES PROCRASTINATED PROCRASTINATES
PROGESTATIONAL PROLETARIANISE PROLETARIANISM PROLETARIANIZE PROPAEDEUTICAL
PROPAGABLENESS PROPAGANDISERS PROPAGANDIZERS PROTOLANGUAGES PROTOPLANETARY
PROTOSPATAIRES PROTOSPATHAIRE PSEUDEPIGRAPHA PSYCHOANALYSER PSYCHOANALYZER
QUADRUPLICATED QUADRUPLICATES QUASIPARTICLES RADIOTELEGRAPH RADIOTHERAPIES
RADIOTHERAPIST RAMAPITHECINES RAMPAGEOUSNESS REAPPLICATIONS REAPPRAISEMENT
REAPPROPRIATED REAPPROPRIATES RECAPITALISING RECAPITALIZING RECAPITULATING
RECAPITULATION RECAPITULATIVE RECAPITULATORY REIMPLANTATION REPARABILITIES
REPLACEABILITY REPOLARISATION REPOLARIZATION REPROBATIONARY REPROGRAMMABLE
RHIZOCEPHALANS RHOMBENCEPHALA RHYPAROGRAPHER SAUROPTERYGIAN SCENOGRAPHICAL
SEMAPHORICALLY SEMIPARASITISM SEPARABILITIES SEPARATENESSES SEPARATIONISMS
SEPARATIONISTS SEPARATIVENESS SEPTUAGENARIAN SEPTUAGENARIES SHADOWGRAPHIES
SPARROWGRASSES SPATIOTEMPORAL SPECTACULARITY SPERMATOBLASTS SPERMATOGONIAL
SPERMATOPHORAL SPERMATORRHEAS SPERMATORRHOEA SPERMATOTHECAE SPERMATOTHECAS
SPHAEROCRYSTAL SPORADICALNESS STEGANOGRAPHER STEGANOGRAPHIC STENOGRAPHICAL
STRATIGRAPHERS STRATIGRAPHIES SUBAPPEARANCES SUBPROLETARIAT SUPERABUNDANCE
SUPERANNUATING SUPERANNUATION SUPERNATATIONS SUPERNATURALLY SUPERSATURATED
SUPERSATURATES SUPERTERRANEAN SUPRAMOLECULAR SUPRASEGMENTAL TELAUTOGRAPHIC
TEREPHTHALATES TETRASPORANGIA TRANSCRIPTASES TRANSPARENCIES TRANSPARENTISE
TRANSPARENTIZE TRANSPLACENTAL TRANSPLANTABLE TRANSPORTANCES ULTRACREPIDATE
UNAPPRECIATION UNAPPRECIATIVE UNAPPROACHABLE UNAPPROPRIATED UNAPPROPRIATES
UNMETAPHORICAL UNPLEASANTRIES UNPROGRAMMABLE UNPURCHASEABLE UNRECAPTURABLE
UPGRADEABILITY VAPORABILITIES XENOTRANSPLANT XEROPHTHALMIAS