There are 544 eleven-letter words containing A, B, D and R, https://www.bestwordlist.com/c/a/4/11letterwordswithabdr.htm
ABANDONWARE ABBREVIATED ABECEDARIAN ABERDEVINES ABIRRITATED ABORTICIDES
ABOVEGROUND ABRACADABRA ABRIDGEABLE ABRIDGEMENT ABRIDGMENTS ABSURDITIES
ADDRESSABLE ADORABILITY ADUMBRATING ADUMBRATION ADUMBRATIVE ADVERBIALLY
AEROBICISED AEROBICIZED AFTERBODIES AIRBOARDING AMBASSADORS AMBIDEXTERS
AMBUSCADERS ARABINOSIDE ARQUEBUSADE BABYPROOFED BACHELORDOM BACKCROSSED
BACKDRAUGHT BACKDROPPED BACKGROUNDS BACKHANDERS BACKSLIDERS BACKSPEERED
BACKSPEIRED BACKSTROKED BACKTRACKED BACKVELDERS BACTERICIDE BACTERIOIDS
BADDERLOCKS BADGERLIEST BALDERLOCKS BALLADEERED BALLYRAGGED BALUSTRADED
BALUSTRADES BANDEIRANTE BANDERILLAS BANDLEADERS BANDMASTERS BANDOLEERED
BANDOLIERED BARDOLATERS BAREFACEDLY BAREHANDING BARGEBOARDS BARNSTORMED
BARRAMUNDAS BARRAMUNDIS BARRELHEADS BARRICADERS BARRICADING BARRICADOED
BARRICADOES BARTENDINGS BASIDIOCARP BASTARDISED BASTARDISES BASTARDISMS
BASTARDIZED BASTARDIZES BASTARDLIER BASTARDRIES BATTLEDOORS BATTLEDORES
BATTLEDRESS BEADBLASTER BEADWORKERS BEARDEDNESS BEARDTONGUE BEAVERBOARD
BECLAMOURED BECOWARDING BEDARKENING BEDCHAMBERS BEDIAPERING BEDRAGGLING
BEGGARHOODS BEGGARWEEDS BEGLAMOURED BELEAGUERED BENCHMARKED BEPLASTERED
BERDACHISMS BESCATTERED BESPATTERED BESPREADING BESTRADDLED BESTRADDLES
BESTRIDABLE BICHROMATED BILLBOARDED BIODEGRADED BIODEGRADES BIOTURBATED
BIPOLARISED BIPOLARIZED BIPYRAMIDAL BIQUADRATES BIQUADRATIC BIRDBRAINED
BIRDWATCHED BIRDWATCHER BIRDWATCHES BLACKBIRDED BLACKBIRDER BLACKBOARDS
BLACKGUARDS BLACKHANDER BLADDERIEST BLADDERLIKE BLADDERNOSE BLADDERNUTS
BLADDERWORT BLANDISHERS BLASTODERMS BLIZZARDIER BLIZZARDING BLOCKBOARDS
BLOODSTREAM BOARDSAILOR BOATBUILDER BODYBOARDED BODYBOARDER BODYGUARDED
BODYSHAPERS BOMBARDIERS BOMBARDMENT BONDSERVANT BOOMERANGED BOOTLOADERS
BORDERLANDS BORDRAGINGS BRACHIOPODS BRACHYDOMES BRACHYODONT BRADYCARDIA
BRADYKININS BRADYPEPTIC BRADYSEISMS BRAGADISMES BRAGGADOCIO BRAINWASHED
BRANCHIOPOD BRANDISHERS BRANDISHING BRAZILWOODS BREADBASKET BREADBOARDS
BREADCRUMBS BREADFRUITS BREADKNIVES BREADSTICKS BREADSTUFFS BREADTHWAYS
BREADTHWISE BREADWINNER BREAKDANCED BREAKDANCER BREAKDANCES BREAKFASTED
BREASTFEEDS BRICKSHAPED BRIDEMAIDEN BRIDESMAIDS BRIDEWEALTH BRIDEZILLAS
BRIDGEBOARD BRIDGEHEADS BRIGANDAGES BRIGANDINES BRIGANDRIES BRILLIANTED
BROADCASTED BROADCASTER BROADCLOTHS BROADLEAVED BROADLEAVES BROADNESSES
BROADPIECES BROADSHEETS BROADSIDING BROADSWORDS BUCCANEERED BUCCANIERED
BUDGERIGARS BULLYRAGGED BURGLARISED BURGLARIZED BURRAMUNDIS BUTTERHEADS
CANDELABRAS CANDELABRUM CANDLEBERRY CARBAMIDINE CARBONADOED CARBONADOES
CARBONNADES CARBURETTED CENTERBOARD CENTREBOARD CHALKBOARDS CHALKBROODS
CHAMBERHAND CHAMBERMAID CHARBROILED CHEESEBOARD CHESSBOARDS CLAPBOARDED
CODEBREAKER CONTRABANDS CORNBRAIDED CRABBEDNESS CRISPBREADS CROOKBACKED
CROSSBANDED CROSSBARRED CUPBOARDING CURVEBALLED DAGGERBOARD DEALBREAKER
DEATTRIBUTE DEBARCATION DEBARKATION DEBARRASSED DEBARRASSES DECARBONATE
DECARBONISE DECARBONIZE DECARBURISE DECARBURIZE DECEREBRATE DEFERRABLES
DEFIBRINATE DEFLAGRABLE DELIBERATED DELIBERATES DELIBERATOR DELIVERABLE
DENUMERABLE DENUMERABLY DEPRECIABLE DESCRAMBLED DESCRAMBLER DESCRAMBLES
DESCRIBABLE DESTROYABLE DETRIBALISE DETRIBALIZE DEVERBATIVE DIATRIBISTS
DISBARMENTS DISBRANCHED DISBRANCHES DISBURSABLE DISCARDABLE DISCERNABLE
DISCERNABLY DISEMBARKED DISPROVABLE DISTURBANCE DISTURBANTS DITHYRAMBIC
DIVORCEABLE DOLABRIFORM DOLLARBIRDS DORSOLUMBAR DRAINBOARDS DRAPABILITY
DRAWBRIDGES DRIVABILITY DROMOPHOBIA DRUMBEATERS DRUMBEATING DUMBWAITERS
DURABLENESS ELUCUBRATED EMBARCADERO EMBARRASSED EMBASSADORS EMBRYONATED
EXACERBATED EXORBITATED EXPROBRATED FAUXBOURDON FEATHERBEDS FIBERBOARDS
FIBREBOARDS FIBRILLATED FINGERBOARD FLASHBOARDS FLOORBOARDS FLORIBUNDAS
FOOTBREADTH FORBIDDANCE GALLBLADDER GINGERBREAD GOATSBEARDS GOLDBEATERS
GRADABILITY GRANDBABIES GRAYBEARDED GREASEBANDS GREYBEARDED GROUNDBAITS
HABERDASHER HAIRBRAINED HAIRBREADTH HALBERDIERS HANDBALLERS HANDBARROWS
HANDBREADTH HARBINGERED HARBOURSIDE HAREBRAINED HAWKSBEARDS HEADBANGERS
HEADBOROUGH HEBDOMADARS HEBDOMADARY HEBDOMADERS HEREDITABLE HEREDITABLY
HOVERBOARDS HUDIBRASTIC HUSBANDLIER HUSBANDRIES HYBRIDOMATA HYDROCARBON
HYDROPHOBIA INTURBIDATE IRRADICABLE IRRADICABLY KEYBOARDERS KEYBOARDING
KEYBOARDIST KNEEBOARDED LABOREDNESS LABRADOODLE LABRADORITE LADDERBACKS
LAMEBRAINED LANDLUBBERS LAVERBREADS LEADERBOARD LIBERALISED LIBERALIZED
LINERBOARDS LIQUIDAMBAR LUMBERYARDS MACERANDUBA MARBLEWOODS MASTURBATED
MATCHBOARDS MISBRANDING MISLABOURED MOORBUZZARD MORBIDEZZAS MORTARBOARD
MOTHERBOARD MOTORBOATED MOULDBOARDS MURDERBALLS NARROWBANDS NONDURABLES
NOTICEBOARD NUDIBRANCHS OBDURATIONS OBLITERATED OBSIDIONARY OBTRUNCATED
ONBOARDINGS ORBICULATED OUTBRAZENED OUTBREATHED OVERABOUNDS OVERLABORED
PADDLEBOARD PAEDOTRIBES PALPEBRATED PAPERBACKED PAPERBOARDS PAPERBOUNDS
PARABOLISED PARABOLIZED PARABOLOIDS PASTEBOARDS PATCHBOARDS PERSUADABLE
PERTURBATED PLUNDERABLE PONDERABLES PREABSORBED PREBOARDING PRECLUDABLE
PREDIABETES PREDIABETIC PREDICABLES PREDICTABLE PREDICTABLY PREOBTAINED
PRESSBOARDS PROTRUDABLE PUNCHBOARDS RABIDNESSES RADIOCARBON RADIOLABELS
READABILITY REASSEMBLED REBRANDINGS REBROADCAST REDOUBTABLE REDOUBTABLY
REDRESSABLE REINHABITED REKEYBOARDS RESCINDABLE RHABDOCOELE RHABDOLITHS
RHABDOMANCY RHABDOMERES RHABDOMYOMA RHABDOVIRUS RHOMBOHEDRA ROADABILITY
ROADBLOCKED ROLLERBLADE ROUNDABOUTS ROUNDTABLES SADDLEBREDS SAILBOARDED
SAILBOARDER SANDBAGGERS SANDBLASTER SCABBARDING SCALEBOARDS SCARABAEIDS
SCARABAEOID SCOREBOARDS SCRAPBOOKED SCRIVEBOARD SHADBERRIES SHARPBENDER
SHORTBOARDS SHORTBREADS SHOVELBOARD SKATEBOARDS SKIMBOARDED SKIMBOARDER
SLUMBERLAND SMOKEBOARDS SMORGASBORD SNOWBLADERS SNOWBOARDED SNOWBOARDER
SOLDERABLES SOUNDBOARDS SPLASHBOARD SPRINGBOARD STARBOARDED STERNBOARDS
STORYBOARDS STRAWBOARDS STRINGBOARD STROBILATED SUBAHDARIES SUBCARDINAL
SUBDEACONRY SUBDERMALLY SUBORDINARY SUBORDINATE SUBSTANDARD SUBSTRACTED
SUBTRAHENDS SUPERABOUND SUPERBOARDS SURFBOARDED SURFBOARDER SURTARBRAND
SURTURBRAND SWEETBREADS SWITCHBOARD SWORDBEARER TABERNACLED TABULARISED
TABULARIZED TAILORBIRDS TARBOGGINED TEETERBOARD THREADBARER TIMBERHEADS
TIMBERLANDS TIMBERYARDS TRANSBORDER TRANSCRIBED TROUBADOURS UNABROGATED
UNBARRICADE UNBIRTHDAYS UNBRACKETED UNDERBAKING UNDERBEARER UNDERBREATH
UNDESIRABLE UNDESIRABLY UNDRAINABLE UNDRINKABLE UNDRIVEABLE UNENDURABLE
UNENDURABLY UNHARBOURED UNLIBERATED UNSCABBARDS UNSCRAMBLED UNTRADEABLE
UPBRAIDINGS UPGRADEABLE VERGEBOARDS VERTEBRATED VIBRACULOID WAFERBOARDS
WAKEBOARDED WAKEBOARDER WALDSTERBEN WATTLEBIRDS WEAVERBIRDS WEIGHBOARDS
WHITEBEARDS WHITEBOARDS WINDBAGGERY WINDBREAKER