There are 468 thirteen-letter words containing A, B, C and R, https://www.bestwordlist.com/c/a/4/13letterwordswithabcr.htm
ABORTIFACIENT ABSTRACTIONAL ABSTRACTIVELY ACINETOBACTER ACQUIRABILITY
ACROBATICALLY AILOUROPHOBIC ALGEBRAICALLY ANAEROBICALLY ANTIBACTERIAL
ANTIMICROBIAL ANTISCORBUTIC ARABICISATION ARABICIZATION ARACHNOPHOBES
ARACHNOPHOBIA ARACHNOPHOBIC ARBITRATRICES ARBORESCENCES ARBORICULTURE
ARCHAEOBOTANY ARCHBISHOPRIC ASCERTAINABLE ASCERTAINABLY BACCALAUREATE
BACHELORETTES BACHELORHOODS BACHELORSHIPS BACKCOUNTRIES BACKGROUNDERS
BACKGROUNDING BACKSCATTERED BACKSCRATCHED BACKSCRATCHER BACKSCRATCHES
BACKSTARTINGS BACKSTRAIGHTS BACKSTRETCHES BACKSWORDSMAN BACKSWORDSMEN
BACKTRACKINGS BACKWARDATION BACTERIOCIDAL BACTERIOCIDES BACTERIOLOGIC
BACTERIOLYSES BACTERIOLYSIN BACTERIOLYSIS BACTERIOLYTIC BACTERIOPHAGE
BACTERIOPHAGY BACTERIOSTATS BACTERIOTOXIN BACTERISATION BACTERIZATION
BACULOVIRUSES BALDERLOCKSES BANCASSURANCE BAREFACEDNESS BARORECEPTORS
BATHYMETRICAL BEHAVIORISTIC BENCHMARKINGS BENEFICIARIES BETACAROTENES
BIBLIOGRAPHIC BIBLIOTHECARY BICAMERALISMS BICAMERALISTS BICENTENARIES
BICULTURALISM BIDIRECTIONAL BIMOLECULARLY BIOELECTRICAL BIOGEOGRAPHIC
BIOINFORMATIC BIOMETRICALLY BIOMETRICIANS BIRDWATCHINGS BISYMMETRICAL
BLACKBERRYING BLACKBIRDINGS BLACKCURRANTS BLACKGUARDING BLACKGUARDISM
BLADDERWRACKS BODYSNATCHERS BONNYCLABBERS BORAGINACEOUS BOROSILICATES
BRACHIOSAURUS BRACHYCEPHALS BRACHYCEPHALY BRACHYDACTYLY BRACHYPTERISM
BRACHYPTEROUS BRACHYTHERAPY BRAGGADOCIOUS BRAINCHILDREN BRAINSICKNESS
BRASSICACEOUS BREADCRUMBING BREAKDANCINGS BREECHLOADERS BROADCASTINGS
BROMELIACEOUS BRONCHOGRAPHY BRONCHOSPASMS BUCCANEERINGS BUREAUCRACIES
BUREAUCRATESE BUREAUCRATISE BUREAUCRATISM BUREAUCRATIST BUREAUCRATIZE
CABINETMAKERS CACKLEBERRIES CAMPYLOBACTER CANCEROPHOBIA CANCERPHOBIAS
CANDLEBERRIES CARBAMAZEPINE CARBOHYDRASES CARBOHYDRATES CARBONIFEROUS
CARBONISATION CARBONIZATION CARBONYLATING CARBONYLATION CARBOXYLATING
CARBOXYLATION CARBURISATION CARBURIZATION CARDBOARDIEST CARPETBAGGERS
CARPETBAGGERY CARPETBAGGING CATEGORIZABLE CELIBATARIANS CENSURABILITY
CEREBROSPINAL CEREBROTONIAS CHARGEABILITY CHATEAUBRIAND CHECKERBOARDS
CHEQUERBOARDS CHILDBEARINGS CHIMNEYBOARDS CHIMNEYBREAST CHLORAMBUCILS
CHONDROBLASTS CIRCUMAMBAGES CIRCUMAMBIENT CLAPPERBOARDS CLAUSTROPHOBE
COACHBUILDERS COBALTIFEROUS COCARBOXYLASE COLLABORATING COLLABORATION
COLLABORATIVE COLLABORATORS COLORABLENESS COLOURABILITY COMBINATORIAL
COMBINATORICS COMMEASURABLE COMMENSURABLE COMMENSURABLY COMPARABILITY
CONCELEBRANTS CONCELEBRATED CONCELEBRATES CONCUBINARIES CONFABULATORS
CONFABULATORY CONGRATULABLE CONJECTURABLE CONJECTURABLY CONSIDERABLES
CONSTRAINABLE CONSTRUCTABLE CONTRABANDISM CONTRABANDIST CONTRABASSIST
CONTRABASSOON CONTRABBASSOS CONTRIBUTABLE COPYRIGHTABLE CORROBORATING
CORROBORATION CORROBORATIVE CORROBORATORS CORROBORATORY COUNTERBLASTS
COUNTERBRACED COUNTERBRACES CRABBEDNESSES CREDITABILITY CRISTOBALITES
CROSSBANDINGS CROSSBARRINGS CRYSTALISABLE CRYSTALIZABLE CURABLENESSES
CYANOBACTERIA CYBERATHLETES CYBERATTACKER CYBERCHONDRIA CYBERCRIMINAL
CYBERNETICIAN CYBERSQUATTER CYBERSTALKERS CYBERSTALKING CYTOMEMBRANES
DAUNORUBICINS DECARBONATING DECARBONATION DECARBONATORS DECARBONISERS
DECARBONISING DECARBONIZERS DECARBONIZING DECARBOXYLASE DECARBOXYLATE
DECARBURATION DECARBURISING DECARBURIZING DECEREBRATING DECEREBRATION
DIBRANCHIATES DISCHARGEABLE DISCREDITABLE DISCREDITABLY DISCRIMINABLE
DISCRIMINABLY ELASMOBRANCHS ELECTRIFIABLE ELUCUBRATIONS EMBRACINGNESS
EMBRANCHMENTS EMBRYOLOGICAL EMBRYONICALLY EMBRYOTICALLY ENCUMBRANCERS
EXACERBATIONS EXECRABLENESS EXORBITANCIES FACTORABILITY FEBRIFACIENTS
FIBROSARCOMAS FIBROVASCULAR FLUOROCARBONS FRANCOPHOBIAS GREENBACKISMS
HARDSCRABBLES HEBEPHRENIACS HETEROBLASTIC HUBRISTICALLY IMMARCESCIBLE
IMPERCEIVABLE IMPRACTICABLE IMPRACTICABLY INAPPRECIABLE INAPPRECIABLY
INCONSTRUABLE INCONVERSABLE INCUMBRANCERS INCURABLENESS INDESCRIBABLE
INDESCRIBABLY INOBSERVANCES INTERBRANCHES INTRACEREBRAL IRASCIBLENESS
IRRECLAIMABLE IRRECLAIMABLY IRRECOVERABLE IRRECOVERABLY IRREPLACEABLE
IRREPLACEABLY ISOBAROMETRIC ISOCARBOXAZID JABBERWOCKIES KNUCKLEBALLER
LABYRINTHICAL LAMELLIBRANCH LIEBFRAUMILCH LUBRICATIONAL LUMBERJACKETS
LUMBRICALISES MACROGLOBULIN MARSIPOBRANCH MATCHBOARDING MEMBRANACEOUS
MICROBALANCES MICROFILMABLE MICROHABITATS MICROWAVEABLE MISOBSERVANCE
MISTRANSCRIBE MULTIBRANCHED MYCOBACTERIAL MYCOBACTERIUM NEUROFEEDBACK
NITROBACTERIA NONBROADCASTS NONCOMPARABLE NONOBSERVANCE NONRECYCLABLE
OBSCURANTISMS OBSCURANTISTS OBSTETRICALLY OBSTETRICIANS OBSTRUCTIONAL
OPISTHOBRANCH OVERABUNDANCE OVERBALANCING OVERBLEACHING OVEREXCITABLE
PARABOLICALLY PARASYMBIOTIC PARTICLEBOARD PERENNIBRANCH PHLEBOGRAPHIC
POLYCARBONATE PREBIOLOGICAL PREDICABILITY PREFABRICATED PREFABRICATES
PREFABRICATOR PRESBYACOUSES PRESBYACOUSIS PROBABILISTIC PROBLEMATICAL
PROBOSCIDEANS PROBOSCIDIANS PROCARBAZINES PRONOUNCEABLE PROTUBERANCES
PSYCHOBABBLER QUARTERBACKED RADIOBIOLOGIC REBROADCASTED RECALIBRATING
RECALIBRATION RECALLABILITY RECEIVABILITY RECOMBINATION RECOMMENDABLE
RECOMMENDABLY RECOMPENSABLE RECYCLABILITY REINFORCEABLE RELUBRICATING
RELUBRICATION REMEMBRANCERS REPLICABILITY REPUBLICANISE REPUBLICANISM
REPUBLICANIZE REPUBLICATION RESECTABILITY REVOCABLENESS RHABDOMANCERS
RHABDOMANCIES RIBONUCLEASES SACRIFICEABLE SCATTERBRAINS SCHLUMBERGERA
SCORBUTICALLY SCRAPBOOKINGS SCRAPERBOARDS SCRATCHBOARDS SCRATCHBUILDS
SCRIEVEBOARDS SCROBICULATED SEARCHABILITY SECOBARBITALS SEMIABSTRACTS
SEMICARBAZIDE SEMICARBAZONE SIMARUBACEOUS SNOBBOCRACIES SORBEFACIENTS
STROBILACEOUS SUBAPPEARANCE SUBARACHNOIDS SUBARCUATIONS SUBCATEGORIES
SUBCATEGORISE SUBCATEGORIZE SUBCHARTERING SUBCLAVICULAR SUBCONTRACTED
SUBCONTRACTOR SUBCONTRARIES SUBCORIACEOUS SUBCULTURALLY SUBDEACONRIES
SUBFACTORIALS SUBLITERACIES SUBPRINCIPALS SUBSTRACTIONS SUBSTRUCTURAL
SUBTRIPLICATE SUBTROPICALLY SUBURBICARIAN SUPERCABINETS SWASHBUCKLERS
SYBARITICALLY TETRABASICITY TETRASYLLABIC THERMOBALANCE THIOCARBAMIDE
THOROUGHBRACE TIMBROMANIACS TRACEABLENESS TRACTABLENESS TRANSCRIBABLE
TRICARBOXYLIC TRIPLOBLASTIC TRISYLLABICAL TRITUBERCULAR TROPHOBLASTIC
TUBERCULATELY TUBERCULATION TUBERCULOMATA TUBOCURARINES TURBOCHARGERS
TURBOCHARGING UMBRACULIFORM UNBARRICADING UNCOMFORTABLE UNCOMFORTABLY
UNCONFORMABLE UNCONFORMABLY UNCONQUERABLE UNCONQUERABLY UNCONVERSABLE
UNCORRECTABLE UNDESCRIBABLE UNENFORCEABLE UNINFORCEABLE UNOBSERVANCES
UNPERCEIVABLE UNPERCEIVABLY UNPRACTICABLE UNPREDICTABLE UNPREDICTABLY
UNPROBLEMATIC UNPURCHASABLE UNRECLAIMABLE UNRECLAIMABLY UNRECOVERABLE
UNRECOVERABLY UNRECYCLABLES UNREPLACEABLE UNRESPECTABLE UNSCABBARDING
UNSEARCHABLES UNSERVICEABLE UNSERVICEABLY VERBIFICATION VIBRACULARIUM
VIBRATIUNCLES VOCABULARIANS VRAISEMBLANCE