There are 501 twelve-letter words containing A, F and 2I, https://www.bestwordlist.com/c/a/4/12letterwordswithafii.htm ACRIFLAVINES AERIFICATION AFFABILITIES AFFECTIONING AFFICIONADOS AFFILIATIONS AFFIRMATIONS AFFIRMATIVES AFFLICTIVELY AFFRICATIONS AFFRICATIVES AIRFREIGHTED ANGUILLIFORM ANTIAIRCRAFT ANTIFASCISMS ANTIFASCISTS ANTIFASHIONS ANTIFEBRILES ANTIFEMININE ANTIFEMINISM ANTIFEMINIST ANTIFOULINGS ANTIFRICTION ARTIFICIALLY BACKFILLINGS BACKFITTINGS BACKFLIPPING BAILIFFSHIPS BASIFICATION BEATIFICALLY BENEFICIALLY BENEFICIATED BENEFICIATES BIFUNCTIONAL BIFURCATIONS BIOFLAVONOID CAFFEINATING CALIFORNIUMS CAULIFLORIES CERTIFICATED CERTIFICATES CHIEFTAINESS CITIFICATION CITYFICATION CLASSIFIABLE CLIFFHANGING CODIFICATION COMPACTIFIED COMPACTIFIES CONFIDENTIAL CONFIRMATION CONFIRMATIVE CONFISCATING CONFISCATION COPLAINTIFFS CRANIOFACIAL CURVIFOLIATE DAFFODILLIES DEACIDIFYING DECALCIFIERS DECALCIFYING DECLASSIFIED DECLASSIFIES DECRASSIFIED DECRASSIFIES DEFIBRILLATE DEFIBRINATED DEFIBRINATES DEFILIATIONS DEFINABILITY DEFINITIONAL DEFLATIONIST DEFOLIATIONS DEFORCIATION DEIFICATIONS DESANCTIFIED DESANCTIFIES DIFFERENTIAE DIFFERENTIAL DIFFRACTIONS DIFFRANGIBLE DIFUNCTIONAL DISAFFECTING DISAFFECTION DISAFFILIATE DISAFFIRMING DISDAINFULLY DISFAVOURING DISFEATURING DISFRANCHISE DISINFECTANT DISINFESTANT DISINFLATION DISQUALIFIED DISQUALIFIER DISQUALIFIES DISSATISFIED DISSATISFIES DISSYLLABIFY EDIFICATIONS EFFEMINACIES EFFEMINATING EFFICACITIES EFFIGURATION EMULSIFIABLE EXFILTRATING EXFILTRATION EXFOLIATIONS FABRICATIONS FABULOSITIES FACILITATING FACILITATION FACILITATIVE FACILITATORS FACILITATORY FACSIMILEING FACSIMILISTS FACTIONALISE FACTIONALISM FACTIONALIST FACTIONALIZE FACTIONARIES FACTITIOUSLY FACTUALISTIC FACTUALITIES FAINEANTISES FAINTISHNESS FAIRNITICKLE FAIRNITICLES FAIRNYTICKLE FAIRNYTICLES FALDISTORIES FALLIBILISMS FALLIBILISTS FAMILIARISED FAMILIARISER FAMILIARISES FAMILIARIZED FAMILIARIZER FAMILIARIZES FAMILIARNESS FANATICISING FANATICIZING FANTASTICISM FARADISATION FARADIZATION FASCINATIONS FASCIOLIASES FASCIOLIASIS FASHIONISTAS FASTIDIOUSLY FATIGABILITY FAULTFINDING FAVORABILITY FAVOURITISMS FEBRIFACIENT FEDERALISING FEDERALISTIC FEDERALIZING FELICITATING FELICITATION FELICITATORS FEMINALITIES FEMINISATION FEMINIZATION FERRICYANIDE FERTIGATIONS FERTILISABLE FERTILIZABLE FESTINATIONS FIBERISATION FIBERIZATION FIBRILLATING FIBRILLATION FIBROBLASTIC FIBROMYALGIA FICTIONALISE FICTIONALITY FICTIONALIZE FIGURABILITY FIGURATIVELY FILIALNESSES FILLAGREEING FILTRABILITY FIMBRIATIONS FINALISATION FINALIZATION FINANCIALIST FINANCIERING FINASTERIDES FINICALITIES FIRESCAPINGS FISSICOSTATE FISSILINGUAL FISSIONABLES FISSIPALMATE FISSIPARISMS FISSIROSTRAL FLACCIDITIES FLAGITATIONS FLAGITIOUSLY FLAMMABILITY FLAVIVIRUSES FLEXITARIANS FLICKERTAILS FLIMFLAMMING FLOATABILITY FLUIDISATION FLUIDIZATION FLUORIDATING FLUORIDATION FLUORINATING FLUORINATION FLUVIOMARINE FOCALISATION FOCALIZATION FONTINALISES FORAMINIFERA FORAMINIFERS FORCIPATIONS FORGEABILITY FORMICATIONS FORNICATIONS FORTEPIANIST FOSSILISABLE FOSSILIZABLE FRACTALITIES FRACTIONISED FRACTIONISES FRACTIONIZED FRACTIONIZES FRANCISATION FRANCIZATION FRANGIBILITY FRANKLINITES FRATERNISING FRATERNITIES FRATERNIZING FRIABILITIES FRICASSEEING FRICTIONALLY FRITILLARIAS FRITILLARIES FRONTALITIES FULMINATIONS FUNDRAISINGS FUNGICIDALLY FUSILLATIONS FUSTIANISING FUSTIANIZING FUSTIGATIONS FUSTILARIANS FUSTILIRIANS FUSTILLIRIAN FUTILITARIAN GAMIFICATION GASIFICATION GIFTWRAPPING GRATIFYINGLY GUITARFISHES HIGHFALUTING HIGHFALUTINS HORRIFICALLY HUMIFICATION HYDATIDIFORM IDENTIFIABLE IDENTIFIABLY INARTIFICIAL INDEFEASIBLE INDEFEASIBLY INDEFINABLES INEFFABILITY INEFFICACIES INEFFICACITY INFAMONISING INFAMONIZING INFANGTHIEFS INFANTICIDAL INFANTICIDES INFANTILISED INFANTILISES INFANTILISMS INFANTILIZED INFANTILIZES INFATUATIONS INFESTATIONS INFEUDATIONS INFIBULATING INFIBULATION INFILTRATING INFILTRATION INFILTRATIVE INFILTRATORS INFINITATING INFIRMARIANS INFLAMMATION INFLATIONARY INFLATIONISM INFLATIONIST INFLECTIONAL INFLUENTIALS INFOGRAPHICS INFOMERCIALS INFORMATIONS INFORMATISED INFORMATISES INFORMATIZED INFORMATIZES INFORMIDABLE INFOTAINMENT INFRAORBITAL INFUNDIBULAR INFURIATIONS INGRAFTATION INSUFFLATING INSUFFLATION INTERFACINGS INTERFLUVIAL INTERFOLIATE INTERTRAFFIC JUSTIFICATOR LANDFILLINGS LATICIFEROUS LATIFUNDIUMS LIFEGUARDING LIFEMANSHIPS LIGULIFLORAL LIQUEFACIENT LIQUEFACTION LIQUEFACTIVE LIQUIFACTION LIQUIFACTIVE MAGNIFICALLY MAGNIFICENCE MAMMILLIFORM MANIFESTIBLE MANIFESTOING METAFICTIONS MICROFILARIA MICROFINANCE MINIFICATION MISFEATURING MISFORMATION MISINFORMANT MODIFICATION MODIFICATIVE MODIFICATORY MORBIFICALLY MULTIFARIOUS MULTIFOLIATE MYOFIBRILLAR NAZIFICATION NIDIFICATING NIDIFICATION NONFICTIONAL NONFINANCIAL NONOFFICIALS NOTIFICATION NULLIFIDIANS OFFICIALDOMS OFFICIALESES OFFICIALISMS OFFICIALTIES OFFICIATIONS OSSIFICATION OVERFAMILIAR PACIFICATING PACIFICATION PACIFICATORS PACIFICATORY PALIFICATION PANIFICATION PARAFFINIEST PARVIFOLIATE PATHFINDINGS PERFOLIATION PETRIFACTION PETRIFACTIVE PINNATIFIDLY PONTIFICALLY PONTIFICATED PONTIFICATES PONTIFICATOR PREACHIFYING PREAMPLIFIER PREFINANCING PREFOLIATION PREQUALIFIED PREQUALIFIES PROFLIGACIES PROLIFICALLY PURIFICATION PURIFICATIVE PURIFICATORS PURIFICATORY QUALIFICATOR QUANTIFIABLE RABBITFISHES RAINPROOFING RAMIFICATION RANGEFINDING RANKSHIFTING RAREFICATION RATIFICATION RECLASSIFIED RECLASSIFIES REFASHIONING REFINANCINGS REFRACTIVITY REFUTABILITY REIFICATIONS REINFLATIONS REQUALIFYING RIBOFLAVINES RIFACIMENTOS SACCHARIFIED SACCHARIFIES SALIFICATION SALVIFICALLY SANCTIFIABLE SANCTIFIEDLY SANCTIFYINGS SAPONIFIABLE SATISFACTION SATISFICINGS SATISFYINGLY SCARIFICATOR SCARIFYINGLY SCIENTIFICAL SEMIFINALIST SEMIOFFICIAL SIGNIFICANCE SIGNIFICANCY SIGNIFICANTS SIGNIFICATES SIGNIFICATOR SIMPLIFIABLE SINFONIETTAS SMIFLIGATING SOLIDIFIABLE SOMNIFACIENT SPEARFISHING SPECIFICALLY SPECIFICATED SPECIFICATES SPIFFLICATED SPIFFLICATES SPIFLICATING SPIFLICATION STEPFAMILIES SUFFIXATIONS SULFADIAZINE SUPERFICIALS SYLLABIFYING TERRIFICALLY TESTIFICATES TESTIFICATOR TIBIOFIBULAE TIBIOFIBULAS TITANIFEROUS TRAFFICKIEST TRAFFICKINGS TRANSFIXIONS TRANSPACIFIC TRIFLURALINS TRIFOLIOLATE TRIFURCATING TRIFURCATION TRINACRIFORM TYPIFICATION UGLIFICATION UNAFFILIATED UNARTIFICIAL UNBENEFICIAL UNCLASSIFIED UNFAMILIARLY UNFASTIDIOUS UNIFICATIONS UNIFOLIOLATE UNMODIFIABLE UNOFFICIALLY UNQUALIFYING UNQUANTIFIED UNSANCTIFIED UNSANCTIFIES UNSATISFYING UNSTRATIFIED UNVERIFIABLE UNVERIFIABLY VERIFICATION VERIFICATIVE VERIFICATORY VERSIFICATOR VILIFICATION VINIFICATION VINIFICATORS VITRIFACTION VITRIFACTURE VIVIFICATION VOCIFERATING VOCIFERATION