There are 695 fifteen-letter words containing A, O and 2R, https://www.bestwordlist.com/c/a/4/15letterwordswithaorr.htm
ABSORPTIOMETERS ACROPARESTHESIA AEROHYDROPLANES AIRWORTHINESSES
ALLOTRIOMORPHIC ANDROGYNOPHORES ANGUSTIROSTRATE ANTHROPOCENTRIC
ANTHROPOLATRIES ANTHROPOMETRIES ANTHROPOMETRIST ANTHROPOMORPHIC
ANTIDIARRHOEALS ANTIFERROMAGNET ANTIFORECLOSURE ANTIPORNOGRAPHY
ANTIPROGRESSIVE ANTIRETROVIRALS APPROPRIATENESS ARBORICULTURIST
ARCHAEOMETRISTS ARCHAEOPTERYXES ARCHEOASTRONOMY ARCHPRIESTHOODS
AROMATHERAPISTS ARRONDISSEMENTS ARTERIALISATION ARTERIALIZATION
ARTERIOGRAPHIES ASTRONAVIGATORS ASTROPHOTOGRAPH ATHEROSCLEROSES
ATHEROSCLEROSIS ATHEROSCLEROTIC AUTOBIOGRAPHERS AUTOCORRELATION
AUTORADIOGRAPHS AUTORADIOGRAPHY AUTOTRANSFORMER BARBAROUSNESSES
BIOSTRATIGRAPHY BRACHIOSAURUSES BRACHISTOCHRONE BROKENHEARTEDLY
BRONCHODILATORS BRONCHOGRAPHIES CARCINOSARCOMAS CARDIOGRAPHICAL
CARDIOPULMONARY CARNIVOROUSNESS CARPOMETACARPUS CATHODOGRAPHERS
CEREBROVASCULAR CERTIFICATORIES CERVICOGRAPHIES CHARTOGRAPHICAL
CHLORPROMAZINES CHLORPROPAMIDES CHONDROCRANIUMS CHORDAMESODERMS
CHORIOCARCINOMA CHROMATOGRAPHED CHROMATOGRAPHER CHROMATOGRAPHIC
CHROMATOPHOROUS CHROMATOSPHERES CHROMOTHERAPIES CHROMOXYLOGRAPH
CHRONOGRAMMATIC CHRONOTHERAPIES CINEMATOGRAPHER CINEMICROGRAPHY
CIRCULARISATION CIRCULARIZATION CIRCUMAMBULATOR CIRCUMFORANEOUS
CIRCUMGYRATIONS CIRCUMNAVIGATOR CONFRATERNITIES CONGLOMERATEURS
CONSERVATORIUMS CONSERVATORSHIP CONSPIRATRESSES CONTAINERBOARDS
CONTEMPERATURES CONTRADICTORIES CONTRADICTORILY CONTRAPROPELLER
CONTRARIOUSNESS CONTROVERSIALLY CORPORATENESSES CORPORATIZATION
CORPOREALNESSES CORPORIFICATION CORPUSCULARIANS CORRELATIVENESS
CORRELATIVITIES CORROBORATIVELY CORYNEBACTERIAL CORYNEBACTERIUM
COUNTERARGUMENT COUNTERATTACKER COUNTERCHARGING COUNTERCHARMING
COUNTERCULTURAL COUNTERGUERILLA COUNTERIRRITANT COUNTERMARCHING
COUNTERMEASURES COUNTERPROPOSAL COUNTERRALLYING COUNTERREACTION
COUNTERSTRATEGY CRASHWORTHINESS CROSSOPTERYGIAN CRYOPRECIPITATE
CRYOPROTECTANTS CRYPTOGRAPHICAL CRYPTOGRAPHISTS CRYSTALLOGRAPHY
CYBERCHONDRIACS DACTYLOGRAPHERS DAGUERREOTYPERS DAGUERREOTYPIES
DAGUERREOTYPING DAGUERREOTYPIST DECARBURISATION DECARBURIZATION
DENITRIFICATORS DEREGISTRATIONS DERMATOGRAPHIAS DERMATOGRAPHIES
DEXTROROTATIONS DIASTEREOISOMER DIFFERENTIATORS DIFFRACTOMETERS
DIFFRACTOMETRIC DISAPPROPRIATED DISAPPROPRIATES DISARTICULATORS
DISCRETIONARILY DISINCORPORATED DISINCORPORATES DISPROPORTIONAL
DOCTRINARIANISM DORSIBRANCHIATE DORSIVENTRALITY DORSOVENTRALITY
DRAUGHTPROOFING DRAUGHTSPERSONS ECCREMOCARPUSES ECHOCARDIOGRAMS
ECTOMYCORRHIZAE ECTOMYCORRHIZAS ELECTROGRAPHIES ELECTROMETRICAL
ELECTROMYOGRAMS ELECTROMYOGRAPH ELECTROPORATION ELECTROSURGICAL
ENTEROBACTERIAL ENTEROBACTERIUM ENTEROGASTRONES EPHEMEROPTERANS
ERGATANDROMORPH ERYTHROMELALGIA EXTEMPORARINESS EXTERIORISATION
EXTERIORIZATION EXTERRITORIALLY EXTRAORDINARIES EXTRAORDINARILY
FARTHINGSWORTHS FERROMAGNETISMS FERROMANGANESES FERROPRUSSIATES
FIBROCARTILAGES FOREORDAINMENTS FOREORDINATIONS FORMULARISATION
FORMULARIZATION FRATERNISATIONS FRATERNIZATIONS GARRULOUSNESSES
GASTROENTERITIC GASTROENTERITIS GRANDMOTHERLIER GRANDPARENTHOOD
GRANGERISATIONS GRANGERIZATIONS GRAVIPERCEPTION GROUNDBREAKINGS
GYNANDROMORPHIC GYROSTABILISERS GYROSTABILIZERS HARPSICHORDISTS
HEARTBROKENNESS HEMATOPORPHYRIN HERESIOGRAPHERS HERESIOGRAPHIES
HERMAPHRODITISM HERNIORRHAPHIES HETEROCERCALITY HETEROCHROMATIC
HETEROCHROMATIN HETEROGRAPHICAL HETERONORMATIVE HIERARCHIZATION
HIEROGRAMMATIST HISTORIOGRAPHER HISTORIOGRAPHIC HORTICULTURALLY
HYDROCORALLINES HYDROEXTRACTORS HYDROMETALLURGY HYDROMETRICALLY
HYDROTHERAPISTS HYDROTROPICALLY HYDROXYBUTYRATE HYETOMETROGRAPH
HYGROMETRICALLY HYPERMETROPICAL HYPERPOLARISING HYPERPOLARIZING
HYPOMENORRHOEAS ICOSITETRAHEDRA IMPERTURBATIONS IMPROVISATORIAL
IMPROVISATRICES IMPROVISATRIXES IMPROVVISATORES IMPROVVISATRICE
INAPPROPRIATELY INDISCRETIONARY INSURRECTIONARY INTERBEHAVIORAL
INTERBEHAVIOURS INTERCOMPARISON INTERCORRELATED INTERCORRELATES
INTERGENERATION INTERGRADATIONS INTERIORISATION INTERIORIZATION
INTERJACULATORY INTERJECTIONARY INTERMIGRATIONS INTERPAROXYSMAL
INTERPERSONALLY INTERPRETATIONS INTERPROVINCIAL INTERROGATINGLY
INTERROGATIONAL INTERROGATIVELY INTERROGATORIES INTERROGATORILY
INTERVALOMETERS INTRAPERITONEAL IRRATIONALISING IRRATIONALISTIC
IRRATIONALITIES IRRATIONALIZING IRRECONCILABLES IRREFORMABILITY
IRREMOVABLENESS IRRESOLVABILITY IRREVOCABLENESS ISOPERIMETRICAL
KATATHERMOMETER KINEMATOGRAPHER LAMELLIROSTRATE MACROAGGREGATED
MACROAGGREGATES MACROMARKETINGS MACROPHOTOGRAPH MACROPRUDENTIAL
MACROSPORANGIUM MACROSTRUCTURAL MACROSTRUCTURES MAJORITARIANISM
MALAPPROPRIATED MALAPPROPRIATES MALPRACTITIONER MARCONIGRAPHING
MARGARITIFEROUS MECHANORECEPTOR MEGACORPORATION MERCAPTOPURINES
METALLOGRAPHERS MICROAEROPHILES MICROAEROPHILIC MICROAGGRESSION
MICROAGGRESSIVE MICROAGGRESSORS MICROBAROGRAPHS MICROEARTHQUAKE
MICROGENERATION MICROMARKETINGS MICROMICROFARAD MICROPHOTOGRAPH
MICRORADIOGRAPH MICROSPORANGIUM MICROSTRUCTURAL MISAPPROPRIATED
MISAPPROPRIATES MISCORRELATIONS MISREGISTRATION MOUNTAINBOARDER
MYOCARDIOGRAPHS NARCOTERRORISMS NARCOTERRORISTS NEUROECTODERMAL
NEUROFIBRILLARY NEUROMARKETINGS NEUROPSYCHIATRY NEUROSURGICALLY
NONAGRICULTURAL NONARCHITECTURE NONARISTOCRATIC NONBARBITURATES
NONCARBOHYDRATE NONCONTEMPORARY NONCORRELATIONS NONDOCTRINAIRES
NONHIERARCHICAL NONPERFORMANCES NONPROFESSORIAL NONTRANSFERABLE
NORTHCOUNTRYMAN NORTHEASTERLIES NORTHEASTERNERS NORTHEASTWARDLY
NORTHWESTWARDLY ORCHESOGRAPHIES ORCHESTRATIONAL OREOGRAPHICALLY
ORGANOCHLORINES ORGANOGRAPHICAL ORGANOGRAPHISTS ORGANOMERCURIAL
ORGANOTHERAPIES ORTHOCHROMATISM ORTHOPSYCHIATRY OSTEOARTHRITICS
OVERABSTRACTION OVERADVERTISING OVERADVERTIZING OVERALERTNESSES
OVERARTICULATED OVERARTICULATES OVERBEARINGNESS OVERCENTRALISED
OVERCENTRALISES OVERCENTRALIZED OVERCENTRALIZES OVERDECORATIONS
OVERDRAMATISING OVERDRAMATIZING OVEREAGERNESSES OVEREARNESTNESS
OVERELABORATING OVERELABORATION OVERENCOURAGING OVERENTERTAINED
OVEREXAGGERATED OVEREXAGGERATES OVEREXTRACTIONS OVEREXTRAPOLATE
OVEREXTRAVAGANT OVEREXUBERANTLY OVERFAMILIARITY OVERFORWARDNESS
OVERGENERALISED OVERGENERALISES OVERGENERALIZED OVERGENERALIZES
OVERGLAMORISING OVERGLAMORIZING OVERGLAMOURIZED OVERGLAMOURIZES
OVERORCHESTRATE OVERORNAMENTING OVERPERSUASIONS OVERPREPARATION
OVERPROGRAMMING OVERREGULATIONS OVERSATURATIONS PARAHELIOTROPIC
PARAJOURNALISMS PARAMETRISATION PARAMETRIZATION PARAMYXOVIRUSES
PARANORMALITIES PARAROSANILINES PAROEMIOGRAPHER PARTHENOCARPIES
PARTHENOCARPOUS PARTICIPATORIES PERFLUOROCARBON PHARMACOTHERAPY
PHONOCARDIOGRAM PHOTOFLUOROGRAM PHOTOGRAMMETRIC PHOTOMACROGRAPH
PHOTOMICROGRAPH PHOTOREFRACTIVE PHOTOTRANSISTOR PHRASEMONGERING
PHRASEOGRAPHIES PHYTOGEOGRAPHER POLYARTHRITIDES POLYARTHRITISES
POSTHEMORRHAGIC POSTIRRADIATION PRAISEWORTHIEST PREDATORINESSES
PREFABRICATIONS PREFORMATIONISM PREFORMATIONIST PREHISTORICALLY
PREPERFORMANCES PREPONDERANCIES PREPONDERATIONS PREPROFESSIONAL
PREPROGRAMMINGS PREREGISTRATION PRESERVATIONIST PRESSURISATIONS
PRESSURIZATIONS PRESTIDIGITATOR PRETERMINATIONS PRIMORDIALITIES
PRIORITISATIONS PRIORITIZATIONS PROBABILIORISMS PROBABILIORISTS
PROBATIONERSHIP PROCESSIONARIES PROCRASTINATING PROCRASTINATION
PROCRASTINATIVE PROCRASTINATORS PROCRASTINATORY PROCREATIVENESS
PROCURATORSHIPS PROGNOSTICATORS PROGRAMMABILITY PROGRESSIONALLY
PROLETARIANISED PROLETARIANISES PROLETARIANISMS PROLETARIANIZED
PROLETARIANIZES PROLETARIANNESS PROPORTIONALITY PROPORTIONATELY
PROPORTIONATING PROPRIETORIALLY PROSOPOGRAPHERS PROSOPOGRAPHIES
PROTHONOTARIATS PROTOCERATOPSES PROTOHISTORIANS PROTOSPATHAIRES
PROTOSPATHARIUS PROVERBIALISING PROVERBIALIZING PSEUDOARTHROSES
PSEUDOARTHROSIS PSYCHOGERIATRIC PSYCHROMETRICAL PTERYLOGRAPHIES
PYRETOTHERAPIES PYROPHOTOGRAPHS PYROPHOTOGRAPHY QUADRIPARTITION
QUARRELSOMENESS RADIOAUTOGRAPHS RADIOAUTOGRAPHY RADIOGONIOMETER
RADIOGONIOMETRY RADIOMETRICALLY RADIOMICROMETER RADIOPHOSPHORUS
RADIOPROTECTION RADIOPROTECTIVE RADIOSTRONTIUMS RADIOTELEGRAPHS
RADIOTELEGRAPHY RADIOTELEMETERS RADIOTELEMETRIC RADIOTHERAPISTS
RANCOROUSNESSES RAPTUROUSNESSES REACCELERATIONS REACCREDITATION
REACTIONARYISMS REAFFORESTATION REAPPORTIONMENT REAPPROPRIATING
REARTICULATIONS REAUTHORISATION REAUTHORIZATION RECALCITRATIONS
RECERTIFICATION RECHOREOGRAPHED RECHROMATOGRAPH RECIPROCALITIES
RECONCENTRATING RECONCENTRATION RECONFIGURATION RECONFIRMATIONS
RECONSECRATIONS RECONSIDERATION RECOVERABLENESS REDETERMINATION
REDINTEGRATIONS REFORMABILITIES REFORMATIONISTS REFORTIFICATION
REFRACTOMETRIES REFRIGERATORIES REGULARISATIONS REGULARIZATIONS
REINCORPORATING REINCORPORATION REINTERROGATING REINTERROGATION
REINVIGORATIONS REMONSTRATINGLY REMONSTRATIVELY REMORALISATIONS
REMORALIZATIONS RENORMALISATION RENORMALIZATION REORCHESTRATING
REORCHESTRATION REORGANISATIONS REORGANIZATIONS REPHOTOGRAPHING
REPOLARISATIONS REPOLARIZATIONS REPRESENTATIONS REPRISTINATIONS
REPRIVATISATION REPRIVATIZATION REPROACHFULNESS REREGISTRATIONS
RESERVATIONISTS RESTORATIONISMS RESTORATIONISTS RESURRECTIONARY
RETHEORIZATIONS RETRANSMISSIONS RETRIBALIZATION RETROACTIVENESS
RETROACTIVITIES RETROGRADATIONS RETROGRESSIONAL RETROPERITONEAL
REVALORISATIONS REVALORIZATIONS REVERBERATORIES REVOLUTIONARIES
REVOLUTIONARILY RHINOSCLEROMATA RHYPAROGRAPHERS RHYPAROGRAPHIES
ROENTGENOGRAPHS ROENTGENOGRAPHY ROLLERCOASTERED RONTGENOTHERAPY
ROSTROCARINATES SACCHAROMETRIES SARRACENIACEOUS SAUROPTERYGIANS
SCAREMONGERINGS SCLERODERMATOUS SCLEROTHERAPIES SEMIPORNOGRAPHY
SEROPREVALENCES SHERARDISATIONS SHERARDIZATIONS SINISTRODEXTRAL
SOUTHEASTERNERS SPECTROGRAPHIES SPERMATORRHOEAS SPHAEROCRYSTALS
SPHAEROSIDERITE SPORANGIOPHORES SPORANGIOSPORES STAPHYLORRHAPHY
STEGANOGRAPHERS STEREOGRAPHICAL STOCKBROKERAGES STRABISMOMETERS
STRAIGHTFORWARD STRATOSPHERICAL STREPTOCARPUSES SUBPROLETARIATS
SUBSTRATOSPHERE SUBTERRANEOUSLY SUBVERSIONARIES SUPERABSORBENTS
SUPERCARGOSHIPS SUPEREROGATIONS SUPERMAJORITIES SUPERORDINATING
SUPERORDINATION SUPERORGANICISM SUPERORGANICIST SUPERPATRIOTISM
SUPERSATURATION SYNARTHRODIALLY TARSOMETATARSAL TARSOMETATARSUS
TEMERARIOUSNESS TEMPORARINESSES TERATOCARCINOMA TERGIVERSATIONS
TERRITORIALISED TERRITORIALISES TERRITORIALISMS TERRITORIALISTS
TERRITORIALIZED TERRITORIALIZES TETARTOHEDRALLY TETARTOHEDRISMS
TETRAGRAMMATONS TETRAHYDROFURAN TETRASPORANGIUM THALASSOGRAPHER
THERIANTHROPISM THERMOBAROGRAPH THERMOBAROMETER THERMOREGULATED
THERMOREGULATES THERMOREGULATOR THERMOREMANENCE THERMOTHERAPIES
THIOBARBITURATE TORRENTIALITIES TRAINSPOTTERISH TRANSCRIPTIONAL
TRANSFIGURATION TRANSFORMATIONS TRANSGRESSIONAL TRANSHISTORICAL
TRANSISTORISING TRANSISTORIZING TRANSLITERATION TRANSLITERATORS
TRANSMIGRATIONS TRANSMISSOMETER TRANSMOGRIFYING TRANSPIRATIONAL
TRANSPORTATIONS TRANSPORTEDNESS TREACHEROUSNESS TRIBROMOETHANOL
TRIBROMOMETHANE TRICHLOROACETIC TRICHLOROETHANE TRIFLUOPERAZINE
TRIGONOMETRICAL TRIPERSONALISMS TRIPERSONALISTS TRISOCTAHEDRONS
TURBOGENERATORS TYRANNOSAURUSES ULTRACOMMERCIAL ULTRADEMOCRATIC
ULTRAFILTRATION ULTRAMARATHONER ULTRAMICROMETER ULTRAMICROSCOPE
ULTRAMICROSCOPY ULTRAMICROTOMES ULTRAMODERNISMS ULTRAMODERNISTS
ULTRAPRECISIONS ULTRASONOGRAPHY UNAPPROPRIATING UNCHOREOGRAPHED
UNCONTROVERSIAL UNEXTRAORDINARY UNIFORMITARIANS UNPROPORTIONATE
UNREVOLUTIONARY VASOCONSTRICTOR WATERCOLOURISTS WEATHERBOARDING
WEATHERPROOFING XEROGRAPHICALLY XERORADIOGRAPHY