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