There are 889 words containing A, B, K and O, https://www.bestwordlist.com/c/a/4/wordswithabko.htm
ABELMOSK ABELMOSKS ABRICOCK ABRICOCKS ABROOKE ABROOKED ABROOKES
ABROOKING ACKNOWLEDGEABLE ACKNOWLEDGEABLY ADOBELIKE ADORKABLE
AEROBRAKE AEROBRAKED AEROBRAKES AEROBRAKING AEROBRAKINGS AHORSEBACK
AKIMBO ANKLEBONE ANKLEBONES AUDIOBOOK AUDIOBOOKS AUTOBANK AUTOBANKS
BACKBLOCK BACKBLOCKER BACKBLOCKERS BACKBLOCKS BACKBOARD BACKBOARDS
BACKBOND BACKBONDS BACKBONE BACKBONED BACKBONELESS BACKBONES
BACKCLOTH BACKCLOTHS BACKCOMB BACKCOMBED BACKCOMBING BACKCOMBS
BACKCOUNTRIES BACKCOUNTRY BACKCOURT BACKCOURTMAN BACKCOURTMEN
BACKCOURTS BACKCROSS BACKCROSSED BACKCROSSES BACKCROSSING BACKDOOR
BACKDOWN BACKDOWNS BACKDROP BACKDROPPED BACKDROPPING BACKDROPS
BACKDROPT BACKFLOW BACKFLOWS BACKGAMMON BACKGAMMONED BACKGAMMONING
BACKGAMMONS BACKGROUND BACKGROUNDED BACKGROUNDER BACKGROUNDERS
BACKGROUNDING BACKGROUNDS BACKHOE BACKHOED BACKHOEING BACKHOES
BACKHOUSE BACKHOUSES BACKLOAD BACKLOADED BACKLOADING BACKLOADS
BACKLOG BACKLOGGED BACKLOGGING BACKLOGS BACKLOT BACKLOTS BACKMOST
BACKOUT BACKOUTS BACKRONYM BACKRONYMS BACKROOM BACKROOMER BACKROOMERS
BACKROOMS BACKSHORE BACKSHORES BACKSTOP BACKSTOPPED BACKSTOPPING
BACKSTOPS BACKSTORIES BACKSTORY BACKSTROKE BACKSTROKED BACKSTROKER
BACKSTROKERS BACKSTROKES BACKSTROKING BACKSWORD BACKSWORDMAN
BACKSWORDMEN BACKSWORDS BACKSWORDSMAN BACKSWORDSMEN BACKWARDATION
BACKWARDATIONS BACKWOOD BACKWOODS BACKWOODSIER BACKWOODSIEST
BACKWOODSMAN BACKWOODSMEN BACKWOODSY BACKWORD BACKWORDS BACKWORK
BACKWORKER BACKWORKERS BACKWORKS BADDERLOCK BADDERLOCKS BAHOOKIE
BAHOOKIES BAKEBOARD BAKEBOARDS BAKEHOUSE BAKEHOUSES BAKEOFF BAKEOFFS
BAKESHOP BAKESHOPS BAKESTONE BAKESTONES BALDERLOCKS BALDERLOCKSES
BALKANISATION BALKANISATIONS BALKANIZATION BALKANIZATIONS BALLCOCK
BALLCOCKS BALLOCKS BALLOCKSED BALLOCKSES BALLOCKSING BANDOOK
BANDOOKS BANGKOK BANGKOKS BANKBOOK BANKBOOKS BANKNOTE BANKNOTES
BANKROLL BANKROLLED BANKROLLER BANKROLLERS BANKROLLING BANKROLLS
BANNOCK BANNOCKS BAROCK BAROCKS BASHIBAZOUK BASHIBAZOUKS BASKETWORK
BASKETWORKS BAWCOCK BAWCOCKS BAZOOKA BAZOOKAS BAZOUKI BAZOUKIS
BEADWORK BEADWORKER BEADWORKERS BEADWORKS BECLOAK BECLOAKED BECLOAKING
BECLOAKS BERGAMASKO BERGAMASKOS BERGOMASK BERGOMASKS BIOBANK
BIOBANKING BIOBANKINGS BIOBANKS BIOFEEDBACK BIOFEEDBACKS BIOHACKER
BIOHACKERS BIOHACKING BIOHACKINGS BIOMARKER BIOMARKERS BIVOUACKED
BIVOUACKING BIVOUACKS BLACKBOARD BLACKBOARDS BLACKBODIES BLACKBODY
BLACKBOY BLACKBOYS BLACKCOCK BLACKCOCKS BLACKOUT BLACKOUTS BLACKPOLL
BLACKPOLLS BLACKSPOT BLACKSPOTS BLACKTHORN BLACKTHORNS BLACKTOP
BLACKTOPPED BLACKTOPPING BLACKTOPS BLACKWOOD BLACKWOODS BLADEWORK
BLADEWORKS BLANKETFLOWER BLANKETFLOWERS BLAUBOK BLAUBOKS BLOCKABLE
BLOCKADE BLOCKADED BLOCKADER BLOCKADERS BLOCKADES BLOCKADING
BLOCKAGE BLOCKAGES BLOCKBOARD BLOCKBOARDS BLOCKCHAIN BLOCKCHAINS
BLOCKHEAD BLOCKHEADED BLOCKHEADEDLY BLOCKHEADEDNESS BLOCKHEADS
BLOGJACKING BLOGJACKINGS BLOKART BLOKARTING BLOKARTINGS BLOKARTS
BLOWBACK BLOWBACKS BLOWKART BLOWKARTS BOAK BOAKED BOAKING BOAKS
BOARDLIKE BOARDWALK BOARDWALKS BOATHOOK BOATHOOKS BOATLIKE BOATNECK
BOATNECKS BOBAK BOBAKS BOBSKATE BOBSKATES BOGOAK BOGOAKS BOILERMAKER
BOILERMAKERS BOILERMAKING BOILERMAKINGS BOKMAKIERIE BOKMAKIERIES
BONEBLACK BONEBLACKS BONESHAKER BONESHAKERS BOOKABLE BOOKBAG
BOOKBAGS BOOKCASE BOOKCASES BOOKLAND BOOKLANDS BOOKMAKER BOOKMAKERS
BOOKMAKING BOOKMAKINGS BOOKMAN BOOKMARK BOOKMARKED BOOKMARKER
BOOKMARKERS BOOKMARKING BOOKMARKS BOOKPLATE BOOKPLATES BOOKRACK
BOOKRACKS BOOKSTALL BOOKSTALLS BOOKSTAND BOOKSTANDS BOORKA BOORKAS
BOOTBLACK BOOTBLACKS BOOTJACK BOOTJACKS BOOTMAKER BOOTMAKERS
BOOTMAKING BOOTMAKINGS BORAK BORAKS BOSCHVARK BOSCHVARKS BOSHVARK
BOSHVARKS BOSKAGE BOSKAGES BOURKHA BOURKHAS BOUSOUKIA BOUZOUKIA
BRACHYPINAKOID BRACHYPINAKOIDS BRAINWORK BRAINWORKS BREAKBONE
BREAKDOWN BREAKDOWNS BREAKFRONT BREAKFRONTS BREAKOFF BREAKOFFS
BREAKOUT BREAKOUTS BREAKPOINT BREAKPOINTS BREAKTHROUGH BREAKTHROUGHS
BREASTSTROKE BREASTSTROKER BREASTSTROKERS BREASTSTROKES BREASTWORK
BREASTWORKS BROCKAGE BROCKAGES BROCKRAM BROCKRAMS BROKAGE BROKAGES
BROKENHEARTED BROKENHEARTEDLY BROKERAGE BROKERAGES BROOKABLE
BUCKAROO BUCKAROOS BUCKAYRO BUCKAYROS BUCKBOARD BUCKBOARDS BUCKETLOAD
BUCKETLOADS CABINETWORK CABINETWORKS CAKEBOX CAKEBOXES CASEBOOK
CASEBOOKS CASHBOOK CASHBOOKS CHABOUK CHABOUKS CHALKBOARD CHALKBOARDS
CHALKBROOD CHALKBROODS CHAPBOOK CHAPBOOKS CHECKERBOARD CHECKERBOARDS
CHOCKABLOCK CHOKEABLE CLACKBOX CLACKBOXES COCKABULLIES COCKABULLY
COCKBOAT COCKBOATS COCKLEBOAT COCKLEBOATS CODEBREAKER CODEBREAKERS
COMEBACK COMEBACKER COMEBACKERS COMEBACKS CONSTABLEWICK CONSTABLEWICKS
COOKABLE COOKABLES CORKBOARD CORKBOARDS CORNERBACK CORNERBACKS
COUNTBACK COUNTBACKS COUNTERBLOCKADE CRAMBOCLINK CRAMBOCLINKS
CROOKBACK CROOKBACKED CROOKBACKS CRYOBANK CRYOBANKS DATEBOOK
DATEBOOKS DAYBOOK DAYBOOKS DEBARKATION DEBARKATIONS DIAMONDBACK
DIAMONDBACKS DISEMBARKATION DISEMBARKATIONS DOUBLESPEAK DOUBLESPEAKER
DOUBLESPEAKERS DOUBLESPEAKS DUCKBOARD DUCKBOARDS EMBARKATION
EMBARKATIONS FACEBOOK FACEBOOKED FACEBOOKING FACEBOOKS FOLDBACK
FOLDBACKS FOODBANK FOODBANKS FOOTBRAKE FOOTBRAKES FOREKNOWABLE
FORKBALL FORKBALLS GAMEBOOK GAMEBOOKS GAOLBREAK GAOLBREAKING
GAOLBREAKS GAOLBROKE GAOLBROKEN GOBSMACKED GROSBEAK GROSBEAKS
GROUNDBREAKER GROUNDBREAKERS GROUNDBREAKING GROUNDBREAKINGS HACKBOLT
HACKBOLTS HALTERBROKE HALTERBROKEN HANDBOOK HANDBOOKS HEARTBROKE
HEARTBROKEN HEARTBROKENLY HEARTBROKENNESS HOGBACK HOGBACKS HOLDBACK
HOLDBACKS HORNBEAK HORNBEAKS HORSEBACK HORSEBACKS HOUSEBREAK
HOUSEBREAKER HOUSEBREAKERS HOUSEBREAKING HOUSEBREAKINGS HOUSEBREAKS
HOWLBACK HOWLBACKS IRONBARK IRONBARKS JABBERWOCK JABBERWOCKIES
JABBERWOCKS JABBERWOCKY JACKBOOT JACKBOOTED JACKBOOTING JACKBOOTS
JAILBROKE JAILBROKEN JAMBOK JAMBOKKED JAMBOKKING JAMBOKS KABARAGOYA
KABARAGOYAS KABELJOU KABELJOUS KABELJOUW KABELJOUWS KABLOOEY
KABLOOIE KABLOONA KABLOONAS KABLOONAT KABOB KABOBBED KABOBBING
KABOBS KABOCHA KABOCHAS KABOODLE KABOODLES KABOOM KABOOMS KATABOLIC
KATABOLICALLY KATABOLISM KATABOLISMS KATABOTHRON KATABOTHRONS
KEELBOAT KEELBOATS KENOPHOBIA KENOPHOBIAS KEYBOARD KEYBOARDED
KEYBOARDER KEYBOARDERS KEYBOARDING KEYBOARDINGS KEYBOARDIST KEYBOARDISTS
KEYBOARDS KHOTBAH KHOTBAHS KICKABOUT KICKABOUTS KICKBOARD KICKBOARDS
KILOBAR KILOBARS KILOBASE KILOBASES KILOBAUD KILOBAUDS KITEBOARD
KITEBOARDING KITEBOARDINGS KITEBOARDS KNEEBOARD KNEEBOARDED KNEEBOARDING
KNEEBOARDS KNOBHEAD KNOBHEADS KNOCKABOUT KNOCKABOUTS KNOCKBACK
KNOCKBACKS KNOWABLE KNOWABLENESS KNOWABLENESSES KNOWLEDGABILITY
KNOWLEDGABLE KNOWLEDGABLY KNOWLEDGEABLE KNOWLEDGEABLY KOBAN KOBANG
KOBANGS KOBANS KOHLRABI KOHLRABIES KOHLRABIS KOLBASI KOLBASIS
KOLBASSA KOLBASSAS KOLBASSI KOLBASSIS KOOKABURRA KOOKABURRAS
KORFBALL KORFBALLS KOTTABOS KOTTABOSES KOULIBIACA KOULIBIACAS
KOURBASH KOURBASHED KOURBASHES KOURBASHING KUMBALOI LAWBOOK LAWBOOKS
LEUKOBLAST LEUKOBLASTS LOANBACK LOANBACKS LOCKABLE MATCHBOOK
MATCHBOOKS MOCKABLE MOSSBACK MOSSBACKED MOSSBACKS MOUNTEBANK
MOUNTEBANKED MOUNTEBANKERIES MOUNTEBANKERY MOUNTEBANKING MOUNTEBANKINGS
MOUNTEBANKISM MOUNTEBANKISMS MOUNTEBANKS NEUROFEEDBACK NEUROFEEDBACKS
NONBANK NONBANKING NONBANKS NONBLACK NONBLACKS NONBREAKABLE NONBREAKABLES
NONSHRINKABLE NONSINKABLE NOTCHBACK NOTCHBACKS OUTBACK OUTBACKER
OUTBACKERS OUTBACKS OUTBAKE OUTBAKED OUTBAKES OUTBAKING OUTBARK
OUTBARKED OUTBARKING OUTBARKS OUTBREAK OUTBREAKING OUTBREAKS
OVERBAKE OVERBAKED OVERBAKES OVERBAKING OVERBANK OVERBANKS OVERBLANKET
OVERBLANKETS OVERBRAKE OVERBRAKED OVERBRAKES OVERBRAKING PACKBOARD
PACKBOARDS PASSBOOK PASSBOOKS PAWNBROKER PAWNBROKERS PAWNBROKING
PAWNBROKINGS PEEKABO PEEKABOO PEEKABOOS PEEKABOS PICKETBOAT PICKETBOATS
PLAYBOOK PLAYBOOKS PLOUGHBACK PLOUGHBACKS PLOWBACK PLOWBACKS
POCKETABLE POKABLE PROVOKABLE PSALMBOOK PSALMBOOKS RACKABONES
RAINBOWLIKE RAZORBACK RAZORBACKS RECKONABLE REKEYBOARD REKEYBOARDED
REKEYBOARDING REKEYBOARDS REVOKABILITIES REVOKABILITY REVOKABLE
REVOKABLY ROADBLOCK ROADBLOCKED ROADBLOCKING ROADBLOCKS ROCKABIES
ROCKABILLIES ROCKABILLY ROCKABLE ROCKABY ROCKABYE ROCKABYES ROLLBACK
ROLLBACKS ROORBACK ROORBACKS ROUGHBACK ROUGHBACKS SCRAPBOOK SCRAPBOOKED
SCRAPBOOKER SCRAPBOOKERS SCRAPBOOKING SCRAPBOOKINGS SCRAPBOOKS
SHACKLEBONE SHACKLEBONES SHANKBONE SHANKBONES SHOCKABILITIES
SHOCKABILITY SHOCKABLE SHOEBLACK SHOEBLACKS SHOPBREAKER SHOPBREAKERS
SHOPBREAKING SHOPBREAKINGS SJAMBOK SJAMBOKED SJAMBOKING SJAMBOKKED
SJAMBOKKING SJAMBOKS SKATEBOARD SKATEBOARDED SKATEBOARDER SKATEBOARDERS
SKATEBOARDING SKATEBOARDINGS SKATEBOARDS SKIMBOARD SKIMBOARDED
SKIMBOARDER SKIMBOARDERS SKIMBOARDING SKIMBOARDS SKYBOARD SKYBOARDS
SLOTBACK SLOTBACKS SLOWBACK SLOWBACKS SMOKABLE SMOKEABLE SMOKEBOARD
SMOKEBOARDS SNEAKBOX SNEAKBOXES SNOWBANK SNOWBANKS SOAPBARK SOAPBARKS
SOFTBACK SOFTBACKS SOWBACK SOWBACKS STOCKBROKERAGE STOCKBROKERAGES
STONEBREAK STONEBREAKER STONEBREAKERS STONEBREAKS STOPBANK STOPBANKS
STROKABLE SWATCHBOOK SWATCHBOOKS TACKBOARD TACKBOARDS TALKBOX
TALKBOXES TCHOUKBALL TCHOUKBALLS THORNBACK THORNBACKS THROMBOKINASE
THROMBOKINASES THROWBACK THROWBACKS TOKOPHOBIA TOKOPHOBIAS TOMBACK
TOMBACKS TOMBAK TOMBAKS TOUCHBACK TOUCHBACKS TROUBLEMAKER TROUBLEMAKERS
TROUBLEMAKING TROUBLEMAKINGS UNFOREKNOWABLE UNKNOWABILITIES UNKNOWABILITY
UNKNOWABLE UNKNOWABLENESS UNKNOWABLES UNKNOWABLY UNKNOWLEDGEABLE
UNLOCKABLE UNRECKONABLE UNSHOCKABLE UNSMOKABLE UNWORKABILITIES
UNWORKABILITY UNWORKABLE UNWORKABLY WAKEBOARD WAKEBOARDED WAKEBOARDER
WAKEBOARDERS WAKEBOARDING WAKEBOARDINGS WAKEBOARDS WALKABOUT
WALKABOUTS WOOLLYBACK WOOLLYBACKS WORDBREAK WORDBREAKS WORKABILITIES
WORKABILITY WORKABLE WORKABLENESS WORKABLENESSES WORKABLY WORKBAG
WORKBAGS WORKBASKET WORKBASKETS WORKBOAT WORKBOATS WORKTABLE
WORKTABLES YEARBOOK YEARBOOKS YELLOWBACK YELLOWBACKS YELLOWBARK
YELLOWBARKS ZAMBOORAK ZAMBOORAKS