There are 421 fourteen-letter words containing A, I, P and 2R, https://www.bestwordlist.com/c/a/5/14letterwordswithaiprr.htm
ABSORPTIOMETER ABSORPTIOMETRY AMPHIARTHROSES AMPHIARTHROSIS AMPHIPROSTYLAR
ANTHROPOMETRIC ANTICORRUPTION ANTIPERSPIRANT ANTIRESORPTIVE ANTISCRIPTURAL
APPRECIATORILY APPROPRIATIONS ARCHBISHOPRICS ARCHPRIESTHOOD ARCHPRIESTSHIP
AROMATHERAPIES AROMATHERAPIST ARTERIOGRAPHIC ARTHROGRAPHIES ARTHROPLASTIES
AUTOBIOGRAPHER AUTORADIOGRAPH BARRISTERSHIPS BIBLIOGRAPHERS BIOGEOGRAPHERS
BRACHYGRAPHIES BRACHYPTERISMS CARDIOGRAPHERS CARDIOGRAPHIES CARPOMETACARPI
CARTOGRAPHICAL CERAMOGRAPHIES CHARTERPARTIES CHARTOGRAPHIES CHIROGRAPHICAL
CHIROGRAPHISTS CHLORPROMAZINE CHLORPROPAMIDE CHOREOGRAPHIES CHOREOGRAPHING
CHOROGRAPHICAL CHROMATOPHORIC CHRONOGRAPHIES CLAPTRAPPERIES COCHAIRPERSONS
COCONSPIRATORS COMPURGATORIAL CONCORPORATING CONSPIRATORIAL CONTAINERPORTS
CONTEMPORARIES CONTEMPORARILY COPARTNERSHIPS CORPORATIVISMS CORPOREALISING
CORPOREALITIES CORPOREALIZING CORPUSCULARIAN CORPUSCULARITY COTRANSPORTING
COUNTERPARTIES CRYMOTHERAPIES CRYPTOGRAPHIES CRYPTOGRAPHIST CRYPTOSPORIDIA
CURIETHERAPIES DERMATOGRAPHIA DERMATOGRAPHIC DIPTEROCARPOUS DISAPPROBATORY
DISAPPROPRIATE DISCORPORATING DISINCORPORATE DISPROPRIATING DISTEMPERATURE
ELECTROGRAPHIC EPIGRAMMATISER EPIGRAMMATIZER ERYTHROPHOBIAS EXPROPRIATIONS
EXTRAPYRAMIDAL FERROPRUSSIATE FLAVOPURPURINS FLUOROGRAPHIES FRACTOGRAPHIES
HARPSICHORDIST HERESIOGRAPHER HERMAPHRODITES HERMAPHRODITIC HETEROGRAPHIES
HETEROPOLARITY HIEROGRAPHICAL HISTORIOGRAPHY HORRIPILATIONS HYDROGRAPHICAL
HYDROTHERAPIES HYDROTHERAPIST HYGROGRAPHICAL HYPERBARICALLY HYPERIRRITABLE
HYPERKERATOSIS HYPERKERATOTIC HYPERMETROPIAS HYPERNATRAEMIA HYPERPARASITES
HYPERPARASITIC HYPERPITUITARY HYPERPOLARISED HYPERPOLARISES HYPERPOLARIZED
HYPERPOLARIZES HYPERPROSEXIAS HYPERREALISTIC HYPERREALITIES HYPERROMANTICS
HYPERTROPHICAL HYPERURBANISMS HYPERURICAEMIA HYPERURICEMIAS IMPERATORIALLY
IMPERATORSHIPS IMPERFORATIONS IMPERTURBATION IMPROPRIATIONS IMPROVISATORES
IMPROVISATRICE IMPROVVISATORE INCORPORATIONS INCORPOREALITY INFOPRENEURIAL
INFRALAPSARIAN INTERCOMPARING INTERCORPORATE INTEROPERATING INTEROPERATIVE
INTERPAROCHIAL INTERPELLATORS INTERPENETRANT INTERPENETRATE INTERPERMEATED
INTERPERMEATES INTERPILASTERS INTERPLANETARY INTERPRETATING INTERPRETATION
INTERPRETATIVE INTERPUPILLARY IRREPARABILITY IRREPLEVISABLE IRREPROACHABLE
IRREPROACHABLY LEXICOGRAPHERS LIBRARIANSHIPS MACROSPORANGIA MALAPPROPRIATE
MARCONIGRAPHED MARSIPOBRANCHS MERCAPTOPURINE METEOROGRAPHIC MICROAEROPHILE
MICROBAROGRAPH MICROPARASITES MICROPARASITIC MICROPARTICLES MICROSPHERICAL
MICROSPORANGIA MICROSPORIDIAN MISAPPROPRIATE MISPROGRAMMING MODERATORSHIPS
MORPHOGRAPHIES MULTIPARAMETER MYOCARDIOGRAPH NITROPARAFFINS NONPROPRIETARY
NONRECIPROCALS OBSTREPERATING ORGANOGRAPHIES ORGANOGRAPHIST OROGRAPHICALLY
ORTHOGRAPHICAL ORTHOGRAPHISTS OVERPARTICULAR OVERPERSUADING OVERPERSUASION
OVERPROGRAMING PANARTHRITISES PANRADIOMETERS PARAGRAMMATIST PARAJOURNALISM
PARAMETERISING PARAMETERIZING PARAMETRICALLY PARAMILITARIES PARAPHRASTICAL
PARAROSANILINE PAROEMIOGRAPHY PARTHENOCARPIC PARTICLEBOARDS PARTICULARISED
PARTICULARISER PARTICULARISES PARTICULARISMS PARTICULARISTS PARTICULARIZED
PARTICULARIZER PARTICULARIZES PARTICULARNESS PARTRIDGEBERRY PARTURIFACIENT
PATRIARCHALISM PEREGRINATIONS PERENNIBRANCHS PERFORMABILITY PERFORMATIVELY
PERICARDITIDES PERICARDITISES PERIMETRICALLY PERIPHRASTICAL PERLOCUTIONARY
PERLUSTRATIONS PERPENDICULARS PERSCRUTATIONS PERSEVERATIONS PERTURBATIONAL
PERTURBATORIES PETROGRAPHICAL PHRASEOGRAPHIC PHYSIOGRAPHERS PICORNAVIRUSES
PIPIWHARAUROAS PLATYRRHINIANS POLAROGRAPHIES PRAISEWORTHIER PRAISEWORTHILY
PREAUTHORIZING PRECARIOUSNESS PRECONTRACTING PREDESIGNATORY PREDESTINARIAN
PREDESTINATORS PREDETERMINATE PREFABRICATING PREFABRICATION PREFABRICATORS
PREFERENTIALLY PREFIGURATIONS PREFORMULATING PREMANDIBULARS PREMAXILLARIES
PREMILLENARIAN PREOPERATIONAL PREOPERATIVELY PREORDAINMENTS PREORDINATIONS
PREPONDERATING PREPONDERATION PREPROGRAMMING PRESBYTERIALLY PRESERVABILITY
PRESERVATORIES PRESSURISATION PRESSURIZATION PRETERMINATION PREVARICATIONS
PRIMORDIALISMS PRIORITISATION PRIORITIZATION PROBABILIORISM PROBABILIORIST
PROBATIONARIES PROCRASTINATED PROCRASTINATES PROCRASTINATOR PROCRYPTICALLY
PROCURATORSHIP PROFESSORIALLY PROFESSORIATES PROGNOSTICATOR PROGRESSIONARY
PROHIBITIONARY PROLETARIANISE PROLETARIANISM PROLETARIANIZE PROLIFERATIONS
PRONUCLEARISTS PROPAGANDISERS PROPAGANDIZERS PROPERISPOMENA PROPITIATORIES
PROPITIATORILY PROPORTIONABLE PROPORTIONABLY PROPORTIONALLY PROPORTIONATED
PROPORTIONATES PROTHONOTARIAL PROTHONOTARIAT PROTHONOTARIES PROTOHISTORIAN
PROTONOTARIATS PROTOSPATAIRES PROTOSPATHAIRE PROTUBERANCIES PROTUBERATIONS
PROVENTRICULAR PROVERBIALISED PROVERBIALISES PROVERBIALISMS PROVERBIALISTS
PROVERBIALIZED PROVERBIALIZES PROVISIONARIES PSEUDARTHROSIS PTERYLOGRAPHIC
PYROMETRICALLY RADIOAUTOGRAPH RADIOTELEGRAPH RADIOTHERAPIES RADIOTHERAPIST
REALPOLITIKERS REAPPORTIONING REAPPRAISEMENT REAPPROPRIATED REAPPROPRIATES
RECAPITULATORY RECIPROCATIONS REEXPLORATIONS REEXPORTATIONS REGISTRARSHIPS
REIMPORTATIONS REINCORPORATED REINCORPORATES REPARABILITIES REPARTITIONING
REPOLARISATION REPOLARIZATION REPOPULARISING REPOPULARIZING REPRESENTATION
REPRESENTATIVE REPRISTINATING REPRISTINATION REPROBATIONARY RESPIRITUALISE
RESPIRITUALIZE RHYPAROGRAPHIC SAUROPTERYGIAN SCRIPTURALISMS SCRIPTURALISTS
SECRETARYSHIPS SEISMOGRAPHERS SHARECROPPINGS SNIPPERSNAPPER SPARKLEBERRIES
SPECTROGRAPHIC SPIRITUALISERS SPIRITUALIZERS SPORANGIOPHORE SPORANGIOSPORE
SPORTFISHERMAN SPRINGBOARDING STEREOGRAPHIES STEREOGRAPHING STRATIGRAPHERS
STRATIGRAPHIES STRATIGRAPHIST SUBPROLETARIAT SUPERACHIEVERS SUPERCARGOSHIP
SUPERCILIARIES SUPERCRIMINALS SUPEREROGATING SUPEREROGATION SUPEREROGATIVE
SUPERGRAVITIES SUPERHARDENING SUPERIMPORTANT SUPERNORMALITY SUPERORDINATED
SUPERORDINATES SUPERORGANISMS SUPERPARTICLES SUPERPATRIOTIC SUPERREGIONALS
SUPRACHOROIDAL SUPRALAPSARIAN SUPRAMAXILLARY SURROGATESHIPS TETRASPORANGIA
THERIANTHROPIC THERMOGRAPHIES TRANSCRIPTASES TRANSCRIPTIONS TRANSCRIPTOMES
TRANSPARENCIES TRANSPARENTISE TRANSPARENTIZE TRANSPIRATIONS TRANSPORTATION
TRANSPORTINGLY TREASURERSHIPS TRIPERSONALISM TRIPERSONALIST TRIPERSONALITY
ULTRACREPIDATE ULTRAPATRIOTIC ULTRAPRACTICAL ULTRAPRECISION UNAPPROPRIATED
UNAPPROPRIATES UNDERSTRAPPING UNINCORPORATED UNPRAISEWORTHY UNRECIPROCATED
UNSCRIPTURALLY UPROARIOUSNESS URANOGRAPHICAL URANOGRAPHISTS WATERPROOFINGS
WHIPPERSNAPPER