There are 587 ten-letter words containing A, F, I and T, https://www.bestwordlist.com/c/a/4/10letterwordswithafit.htm
ACETIFIERS ACETIFYING ACTINIFORM AFFABILITY AFFECTIONS AFFIDAVITS
AFFILIATED AFFILIATES AFFINITIES AFFINITIVE AFFIRMANTS AFFIXATION
AFFIXMENTS AFFIXTURES AFFLATIONS AFFLICTERS AFFLICTING AFFLICTION
AFFLICTIVE AFFRICATED AFFRICATES AFFRIGHTED AFFRIGHTEN AFFRONTING
AFFRONTIVE AFLATOXINS AFTERBIRTH AFTERBRAIN AFTEREYING AFTERIMAGE
AFTERLIFES AFTERLIVES AFTERPAINS AFTERPIECE AFTERTIMES AGFLATIONS
AIRFREIGHT AIRLIFTING ANTIFAMILY ANTIFEMALE ANTIFREEZE ANTIFUNGAL
ANTILIFERS ANTIREFORM AQUAFORTIS AREFACTION ARTIFICERS ARTIFICIAL
ASAFETIDAS ASAFOETIDA ASSAFETIDA BACKFITTED BAITFISHES BATFOWLING
BEATIFICAL BEATIFYING BEAUTIFIED BEAUTIFIER BEAUTIFIES BIFURCATED
BIFURCATES BISULFATES BOATLIFTED BRAINFARTS BREADFRUIT BUFOTALINS
CAFETERIAS CAFETIERES CAFETORIUM CAFFEINATE CANEFRUITS CATCHFLIES
CATFACINGS CATFISHING CHAIRLIFTS CHIEFTAINS CLOFIBRATE COFAVORITE
COMPACTIFY CONFIDANTE CONFIDANTS CONFISCATE CONFLATING CONFLATION
COWFETERIA CRAFTINESS CYATHIFORM DEADLIFTED DEFAMATION DEFAULTING
DEFEATISMS DEFEATISTS DEFECATING DEFECATION DEFLATIONS DEFOLIANTS
DEFOLIATED DEFOLIATES DEFOLIATOR DEFORCIANT DESANCTIFY DIFFRACTED
DISAFFECTS DISFEATURE DISSATISFY DISULFATES DRAFTINESS DRIVESHAFT
EFFEMINATE EFFICACITY EFFIGURATE ENGRAFTING EXFILTRATE EXFOLIANTS
EXFOLIATED EXFOLIATES EXFOLIATOR FABRICANTS FABRICATED FABRICATES
FABRICATOR FABULATING FABULISTIC FABULOSITY FACELIFTED FACEPRINTS
FACETIMING FACIALISTS FACILITATE FACILITIES FACTIONARY FACTIONIST
FACTIOUSLY FACTITIOUS FACTORIALS FACTORINGS FACTORISED FACTORISES
FACTORIZED FACTORIZES FACTORSHIP FACTUALISM FACTUALIST FACTUALITY
FAGGOTINGS FAGOTTISTS FAINTINGLY FAITHCURES FAITHFULLY FALANGISTS
FALCATIONS FALDISTORY FALTERINGS FAMILISTIC FAMISHMENT FANATICISE
FANATICISM FANATICIZE FANTASISED FANTASISER FANTASISES FANTASISTS
FANTASIZED FANTASIZER FANTASIZES FANTASTICO FANTASTICS FANTASYING
FANTOCCINI FARSIGHTED FASCIATELY FASCIATION FASCINATED FASCINATES
FASCINATOR FASCITISES FASHIONIST FASTENINGS FASTIDIOUS FASTIGIATE
FASTIGIUMS FATALISTIC FATALITIES FATBRAINED FATHERINGS FATHERLIER
FATHERLIKE FATHERSHIP FATIGATING FATIGUABLE FATISCENCE FATTENINGS
FAUCETRIES FAULTINESS FAULTLINES FAVORITISM FAVOURITES FEATHERIER
FEATHERING FEATLINESS FEDERALIST FEDERATING FEDERATION FEDERATIVE
FELICITATE FELLATIONS FELSPATHIC FEMALITIES FEMETARIES FEMINALITY
FERACITIES FERTIGATED FERTIGATES FESTINATED FESTINATES FETIPAROUS
FEUDALISTS FIANCHETTI FIANCHETTO FIBRILLATE FIBROBLAST FIDELISTAS
FIELDCRAFT FIGHTBACKS FIGURANTES FIGURATELY FIGURATION FIGURATIVE
FILATORIES FILIATIONS FILTERABLE FILTRATING FILTRATION FIMBRIATED
FIMBRIATES FINALISTIC FINALITIES FINICALITY FIORATURAE FIREFLOATS
FIREWATERS FIRMAMENTS FISCALISTS FISHPLATES FISHTAILED FLACCIDEST
FLACCIDITY FLACKETING FLAGITATED FLAGITATES FLAGITIOUS FLAGSTICKS
FLASHLIGHT FLASHPOINT FLATFISHES FLATLINERS FLATLINING FLATPICKED
FLATPICKER FLATTENING FLATTERIES FLATTERING FLAUGHTING FLAUNTIEST
FLAVORIEST FLAVORISTS FLAVOURIST FLECTIONAL FLINTHEADS FLIPCHARTS
FLIPPANTLY FLIRTATION FLOATATION FLOATINGLY FLOPTICALS FLOREATING
FLORIATION FLOTATIONS FLUORIDATE FLUORINATE FLUVIALIST FLUVIATILE
FOETATIONS FOETICIDAL FOGRAMITES FOLIATIONS FOLIATURES FONTINALIS
FORAMINATE FORCIPATED FOREDATING FORESTAIRS FORFAITERS FORFAITING
FORMALISTS FORMALITER FORMATIONS FORMATIVES FORMATTING FORMICATED
FORMICATES FORNICATED FORNICATES FORNICATOR FORSYTHIAS FORTALICES
FORTEPIANO FORTILAGES FORWASTING FOUNDATION FOUNTAINED FRACTALITY
FRACTIONAL FRACTIONED FRACTURING FRAMESHIFT FRATCHIEST FRATERNISE
FRATERNITY FRATERNIZE FRATRICIDE FRAUGHTING FREEMARTIN FREIGHTAGE
FRENETICAL FRIABILITY FRICATIVES FRICTIONAL FRIGATOONS FRITILLARY
FRONTALITY FRUGALISTA FRUGALISTS FRUITARIAN FRUITCAKES FUGACITIES
FUGITATION FULMINANTS FULMINATED FULMINATES FULMINATOR FUMATORIES
FUMATORIUM FUMIGATING FUMIGATION FUMIGATORS FUMIGATORY FUNCTIONAL
FUNGISTATS FUNICULATE FURACITIES FURCATIONS FUSTIANISE FUSTIANIST
FUSTIANIZE FUSTIGATED FUSTIGATES FUSTIGATOR GEARSHIFTS GOATFISHES
GRAFFITIED GRAFFITING GRAFFITIST GRAPEFRUIT GRATIFIERS GRATIFYING
GUITARFISH HALFWITTED HANDICRAFT HARDFISTED INFANTEERS INFANTHOOD
INFANTRIES INFARCTION INFATUATED INFATUATES INFECTANTS INFESTANTS
INFIBULATE INFILTRATE INFINITANT INFINITARY INFINITATE INFIXATION
INFLATABLE INFLATEDLY INFLATIONS INFLATUSES INFORMANTS INFRACTING
INFRACTION INFRACTORS INFRAGRANT INFURIATED INFURIATES INFUSCATED
INGRAFTING INGRATEFUL INSUFFLATE INTERFACED INTERFACES INTERFAITH
INTERGRAFT INTIFADAHS INTIFADEHS ISOGRAFTED JACKFRUITS KARSTIFIED
KARSTIFIES KEFALOTIRI KEFALOTYRI KHALIFATES KINGCRAFTS LATICIFERS
LATIFUNDIA LATIFUNDIO LEAFLETING LIGHTFACED LIGHTFACES LOANSHIFTS
MAGNIFICAT MAKESHIFTS MALEFICENT MANIFESTED MANIFESTER MANIFESTLY
MANIFESTOS MATRIFOCAL MATTIFYING MINESHAFTS MISFEATURE MISGRAFTED
MULTIFACED MULTIFLASH MULTIFLORA MULTIFOCAL MUTESSARIF NIDIFICATE
NIGHTFALLS NITROFURAN NONTARIFFS NOTIFIABLE OFFICEMATE OFFICIALTY
OFFICIANTS OFFICIATED OFFICIATES OFFICIATOR OLFACTIBLE OLFACTIONS
OUTFABLING OUTFASTING OUTFAWNING PACIFICATE PACIFICIST PACIFISTIC
PALAFITTES PALMATIFID PARROTFISH PATHFINDER PATRIFOCAL PERFOLIATE
PIANOFORTE PIKESTAFFS PINFEATHER PINNATIFID PLAINTIFFS PONTIFICAL
PREFASCIST PROFASCIST PROFITABLE PROFITABLY PROFLIGATE QUANTIFIED
QUANTIFIER QUANTIFIES QUATREFOIL RABBITFISH RAFFINATES RAFTERINGS
RAINFOREST RANKSHIFTS RASTAFARIS RATIFIABLE REDRAFTING REFLATIONS
REFLOATING REFRACTILE REFRACTING REFRACTION REFRACTIVE REFUTATION
REGRAFTING REINFLATED REINFLATES REISTAFELS RESTAFFING RIJSTAFELS
RIJSTTAFEL RIVERCRAFT ROTIFERANS RUMFUSTIAN SAFELIGHTS SAINTFOINS
SALTFISHES SANCTIFIED SANCTIFIER SANCTIFIES SATISFICED SATISFICER
SATISFICES SATISFIERS SATISFYING SEALIFTING SHEATHFISH SIEGECRAFT
SMIFLIGATE SMITHCRAFT SOLFATARIC SPIFLICATE STAFFRIDER STAINPROOF
STAIRFOOTS STAIRLIFTS STANDFIRST STARDRIFTS STARFISHED STARFISHES
STARFRUITS STEPFAMILY STIFFWARES STRATIFIED STRATIFIES STRATIFORM
SUFFLATING SUFFLATION SUFFRAGIST SULFATIONS TACKIFIERS TACKIFYING
TADALAFILS TAENIAFUGE TAFFETIEST TAFFETISED TAFFETIZED TAMOXIFENS
TARIFFLESS TELEFAXING TENIAFUGES THALLIFORM THIOFURANS THREADFINS
TIMEFRAMES TOADFISHES TRAFFICKED TRAFFICKER TRANSFIXED TRANSFIXES
TRIFACIALS TRIFARIOUS TRIFFIDIAN TRIFOLIATE TRIFURCATE ULTRAFICHE
ULTRAMAFIC UNFAITHFUL UNFANCIEST UNFAULTIER UNFAVORITE UNIFOLIATE
UNINFLATED UNRATIFIED UNSAFETIES UNSANCTIFY VENTIFACTS VOCIFERANT
VOCIFERATE VOUTSAFING WAITSTAFFS WELFARISTS WELFARITES WHEATFIELD
WHIPSTAFFS WHITEFACES WIFEBEATER WITCHCRAFT WOLFRAMITE