There are 737 words containing A, F and K, https://www.bestwordlist.com/c/a/3/wordswithafk.htm
AFTERDECK AFTERDECKS AFTERMARKET AFTERMARKETS AFTERPEAK AFTERPEAKS
AFTERSHOCK AFTERSHOCKS ALFAKI ALFAKIS ALKALIFIED ALKALIFIES ALKALIFY
ALKALIFYING BACKDRAFT BACKDRAFTS BACKFALL BACKFALLS BACKFAT BACKFATS
BACKFIELD BACKFIELDS BACKFILE BACKFILES BACKFILL BACKFILLED BACKFILLING
BACKFILLINGS BACKFILLS BACKFIRE BACKFIRED BACKFIRES BACKFIRING
BACKFISCH BACKFISCHES BACKFIT BACKFITS BACKFITTED BACKFITTING
BACKFITTINGS BACKFLIP BACKFLIPPED BACKFLIPPING BACKFLIPPINGS
BACKFLIPS BACKFLOW BACKFLOWS BACKLIFT BACKLIFTS BAKEOFF BAKEOFFS
BASKETFUL BASKETFULS BASKETSFUL BEAKERFUL BEAKERFULS BEEFCAKE
BEEFCAKES BEEFSTEAK BEEFSTEAKS BIOFEEDBACK BIOFEEDBACKS BLACKFACE
BLACKFACED BLACKFACES BLACKFIN BLACKFINS BLACKFISH BLACKFISHES
BLACKFLIES BLACKFLY BLANKETFLOWER BLANKETFLOWERS BREADKNIFE BREAKFAST
BREAKFASTED BREAKFASTER BREAKFASTERS BREAKFASTING BREAKFASTS
BREAKFRONT BREAKFRONTS BREAKOFF BREAKOFFS CALFLICK CALFLICKS
CALFLIKE CALFSKIN CALFSKINS CHALKFACE CHALKFACES CLOCKFACE CLOCKFACES
COCKCHAFER COCKCHAFERS COCKNEYFICATION COCKNIFICATION COCKNIFICATIONS
COFFEEMAKER COFFEEMAKERS CORNFLAKE CORNFLAKES CRAFTSMANLIKE CRAFTWORK
CRAFTWORKS CRAIGFLUKE CRAIGFLUKES CRANKSHAFT CRANKSHAFTS DANDYFUNK
DANDYFUNKS DARKFIELD DESKFAST DESKFASTS DRAWKNIFE DWARFLIKE ECOFREAK
ECOFREAKS FABRICKED FABRICKING FABRICKINGS FACEBOOK FACEBOOKED
FACEBOOKING FACEBOOKS FACEMASK FACEMASKS FACEWORKER FACEWORKERS
FACTORYLIKE FADLIKE FAIK FAIKED FAIKES FAIKING FAIKS FAIRNITICKLE
FAIRNITICKLES FAIRNYTICKLE FAIRNYTICKLES FAIRYLIKE FAKE FAKED
FAKEER FAKEERS FAKEMENT FAKEMENTS FAKER FAKERIES FAKERS FAKERY
FAKES FAKEST FAKEY FAKEYS FAKIE FAKIER FAKIES FAKIEST FAKING
FAKIR FAKIRISM FAKIRISMS FAKIRS FALLBACK FALLBACKS FALSEWORK
FALSEWORKS FANCYWORK FANCYWORKS FANGLIKE FANK FANKED FANKING
FANKLE FANKLED FANKLES FANKLING FANKS FANLIKE FARKLEBERRIES FARKLEBERRY
FARMWORK FARMWORKER FARMWORKERS FARMWORKS FARNARKEL FARNARKELED
FARNARKELING FARNARKELINGS FARNARKELS FARTLEK FARTLEKS FASTBACK
FASTBACKS FATBACK FATBACKS FATHERLIKE FATLIKE FATSTOCK FATSTOCKS
FAUNLIKE FAWNLIKE FEEDBACK FEEDBACKS FELLWALKER FELLWALKERS FIDDLEBACK
FIDDLEBACKS FIGHTBACK FIGHTBACKS FILMMAKER FILMMAKERS FILMMAKING
FILMMAKINGS FINBACK FINBACKS FINGERMARK FINGERMARKS FINMARK FINMARKS
FINNACK FINNACKS FINNMARK FINNMARKS FIREBACK FIREBACKS FIREBREAK
FIREBREAKS FIRECRACKER FIRECRACKERS FIREDRAKE FIREDRAKES FIREMARK
FIREMARKS FISHCAKE FISHCAKES FISHYBACK FISHYBACKS FLACK FLACKED
FLACKER FLACKERED FLACKERIES FLACKERING FLACKERS FLACKERY FLACKET
FLACKETED FLACKETING FLACKETS FLACKING FLACKS FLAGSTICK FLAGSTICKS
FLAK FLAKE FLAKED FLAKER FLAKERS FLAKES FLAKEY FLAKIER FLAKIES
FLAKIEST FLAKILY FLAKINESS FLAKINESSES FLAKING FLAKS FLAKY FLAMELIKE
FLANK FLANKED FLANKEN FLANKENS FLANKER FLANKERED FLANKERING FLANKERS
FLANKING FLANKS FLAPJACK FLAPJACKS FLAPLIKE FLAPTRACK FLAPTRACKS
FLAREBACK FLAREBACKS FLASHBACK FLASHBACKED FLASHBACKING FLASHBACKS
FLASHPACKER FLASHPACKERS FLASK FLASKET FLASKETS FLASKS FLATBACK
FLATBACKS FLATPACK FLATPACKS FLATPICK FLATPICKED FLATPICKER FLATPICKERS
FLATPICKING FLATPICKS FLATSTICK FLATWORK FLATWORKS FLAXLIKE FLICKABLE
FLICKERTAIL FLICKERTAILS FLOKATI FLOKATIS FLOODMARK FLOODMARKS
FLOORWALKER FLOORWALKERS FLYBACK FLYBACKS FLYMAKER FLYMAKERS
FOAMLIKE FOLDBACK FOLDBACKS FOLKLAND FOLKLANDS FOLKTALE FOLKTALES
FOLKTRONICA FOLKTRONICAS FOLKWAY FOLKWAYS FOODBANK FOODBANKS
FOOTBRAKE FOOTBRAKES FOOTMARK FOOTMARKS FOOTSTALK FOOTSTALKS
FOREKNOWABLE FOREPEAK FOREPEAKS FORERANK FORERANKS FORESHANK
FORESHANKS FORESLACK FORESLACKED FORESLACKING FORESLACKS FORESPAKE
FORESPEAK FORESPEAKING FORESPEAKS FORJASKIT FORKBALL FORKBALLS
FORKHEAD FORKHEADS FORKTAIL FORKTAILS FORSAKE FORSAKEN FORSAKENLY
FORSAKENNESS FORSAKENNESSES FORSAKER FORSAKERS FORSAKES FORSAKING
FORSAKINGS FORSLACK FORSLACKED FORSLACKING FORSLACKS FORSPEAK
FORSPEAKING FORSPEAKS FOXSHARK FOXSHARKS FRACK FRACKED FRACKER
FRACKERS FRACKING FRACKINGS FRACKS FRAKTUR FRAKTURS FRAMEWORK
FRAMEWORKS FRANK FRANKABLE FRANKALMOIGN FRANKALMOIGNS FRANKED
FRANKER FRANKERS FRANKEST FRANKFORT FRANKFORTS FRANKFURT FRANKFURTER
FRANKFURTERS FRANKFURTS FRANKINCENSE FRANKINCENSES FRANKING FRANKLIN
FRANKLINITE FRANKLINITES FRANKLINS FRANKLY FRANKNESS FRANKNESSES
FRANKPLEDGE FRANKPLEDGES FRANKS FRANKUM FRANKUMS FREAK FREAKED
FREAKERIES FREAKERY FREAKFUL FREAKIER FREAKIEST FREAKILY FREAKINESS
FREAKINESSES FREAKING FREAKISH FREAKISHLY FREAKISHNESS FREAKISHNESSES
FREAKOUT FREAKOUTS FREAKS FREAKY FRIEDCAKE FRIEDCAKES FRIKKADEL
FRIKKADELS FRISKA FRISKAS FRUITCAKE FRUITCAKES FUCKFACE FUCKFACES
FUCKHEAD FUCKHEADS FULLBACK FULLBACKS FUNCKIA FUNCKIAS FUNKADELIC
FUNKIA FUNKIAS FUTHARK FUTHARKS GODFORSAKEN HALFBACK HALFBACKS
HALFBEAK HALFBEAKS HALFTRACK HALFTRACKS HANDKERCHIEF HANDKERCHIEFS
HAYFORK HAYFORKS HEADFUCK HEADFUCKS JACKFISH JACKFISHES JACKFRUIT
JACKFRUITS JACKKNIFE JACKKNIFED JACKKNIFES JACKKNIFING JACKSHAFT
JACKSHAFTS JACKSTAFF JACKSTAFFS JAKFRUIT JAKFRUITS KAF KAFFEEKLATSCH
KAFFEEKLATSCHES KAFFIR KAFFIRS KAFFIYAH KAFFIYAHS KAFFIYEH KAFFIYEHS
KAFILA KAFILAS KAFIR KAFIRS KAFS KAFTAN KAFTANS KAFUFFLE KAFUFFLES
KAIF KAIFS KALEWIFE KALIF KALIFATE KALIFATES KALIFS KARSTIFICATION
KARSTIFICATIONS KARSTIFIED KARSTIFIES KARSTIFY KARSTIFYING KEFALOTIRI
KEFALOTIRIS KEFALOTYRI KEFALOTYRIS KEFFIYAH KEFFIYAHS KENAF KENAFS
KEYFRAME KEYFRAMES KHAF KHAFS KHALIF KHALIFA KHALIFAH KHALIFAHS
KHALIFAS KHALIFAT KHALIFATE KHALIFATES KHALIFATS KHALIFS KHARIF
KHARIFS KHILAFAT KHILAFATS KINGCRAFT KINGCRAFTS KLANGFARBE KLANGFARBES
KNIFEMAN KNIPHOFIA KNIPHOFIAS KOFTA KOFTAS KOFTGAR KOFTGARI KOFTGARIS
KOFTGARS KORFBALL KORFBALLS KRAFT KRAFTS KUFIYAH KUFIYAHS LAKEFILL
LAKEFILLS LAKEFRONT LAKEFRONTS LEAFLIKE LEAFSTALK LEAFSTALKS
LEAKPROOF LIFEHACK LIFEHACKED LIFEHACKER LIFEHACKERS LIFEHACKING
LIFEHACKS LIFTBACK LIFTBACKS LOCKFAST MAFFICK MAFFICKED MAFFICKER
MAFFICKERS MAFFICKING MAFFICKINGS MAFFICKS MAKEFAST MAKEFASTS
MAKESHIFT MAKESHIFTS NAKFA NAKFAS NEUROFEEDBACK NEUROFEEDBACKS
OAKLEAF OFFPEAK OFFTAKE OFFTAKES OFFTRACK OUTFLANK OUTFLANKED
OUTFLANKING OUTFLANKS OVERFRANK PACKFONG PACKFONGS PACKFRAME
PACKFRAMES PACKSTAFF PACKSTAFFS PAKFONG PAKFONGS PAPERKNIFE PIKESTAFF
PIKESTAFFS PRANKFUL PREBREAKFAST PREFRANK PREFRANKED PREFRANKING
PREFRANKS PUFFBACK PUFFBACKS RACKFUL RACKFULS RAKEOFF RAKEOFFS
RANKSHIFT RANKSHIFTED RANKSHIFTING RANKSHIFTS RATFINK RATFINKS
ROCKFALL ROCKFALLS ROCKSHAFT ROCKSHAFTS SACKFUL SACKFULS SACKSFUL
SAFECRACKER SAFECRACKERS SAFECRACKING SAFECRACKINGS SAFEKEEPING
SAFEKEEPINGS SCARFSKIN SCARFSKINS SEAFOLK SEAFOLKS SHEAFLIKE
SHELFTALKER SHELFTALKERS SHRINKFLATION SHRINKFLATIONS SIFAKA
SIFAKAS SNAKEFISH SNAKEFISHES SNOWFLAKE SNOWFLAKES SOAPFLAKES
SOFTBACK SOFTBACKS SOOTFLAKE SOOTFLAKES SPEEDFREAK SPEEDFREAKS
STARFUCKER STARFUCKERS STARFUCKING STARFUCKINGS SUPERFLACK SUPERFLACKS
TACKIFIED TACKIFIER TACKIFIERS TACKIFIES TACKIFY TACKIFYING TAKEOFF
TAKEOFFS TALKFEST TALKFESTS TANKFUL TANKFULS THANKFUL THANKFULLER
THANKFULLEST THANKFULLY THANKFULNESS THANKFULNESSES THICKLEAF
TRADESFOLK TRADESFOLKS TRAFFICKED TRAFFICKER TRAFFICKERS TRAFFICKIER
TRAFFICKIEST TRAFFICKING TRAFFICKINGS TRAFFICKY UNFAKED UNFOREKNOWABLE
UNFORSAKEN UNFRANKED UNTHANKFUL UNTHANKFULLY UNTHANKFULNESS WAIFLIKE
WAKEFUL WAKEFULLY WAKEFULNESS WAKEFULNESSES WAKERIFE WAKF WAKFS
WAUKRIFE WEAKFISH WEAKFISHES WORKFARE WORKFARES WORKSAFE WRACKFUL
WREAKFUL ZINCKIFICATION ZINCKIFICATIONS ZINKIFICATION ZINKIFICATIONS