There are 451 fourteen-letter words containing A, F, I and T, https://www.bestwordlist.com/c/a/4/14letterwordswithafit.htm ABORTIFACIENTS ABSORBEFACIENT ACETIFICATIONS ACIDIFICATIONS AFFECTIONATELY AFFORESTATIONS AFFREIGHTMENTS AFOREMENTIONED AFTERSENSATION AGRIFOODSTUFFS AGROFORESTRIES AIRCRAFTSWOMAN AIRCRAFTSWOMEN AMMONIFICATION AMPLIFICATIONS ANGUSTIFOLIATE ANTIDEFAMATION ANTIFEDERALIST ANTIFILIBUSTER ANTIFOREIGNERS ANTIFORMALISMS ANTIFORMALISTS ANTIREFLECTION ANTIREFLECTIVE ANTISCIENTIFIC ARTIFICIALISED ARTIFICIALISES ARTIFICIALIZED ARTIFICIALIZES ARTIFICIALNESS AUTOINFECTIONS BEATIFICATIONS BEAUTIFICATION BENEFICIATIONS BIOINFORMATICS BREASTFEEDINGS CALCIFICATIONS CALORIFICATION CAPRIFICATIONS CARNIFICATIONS CAULIFLOWERETS CENTRIFUGALISE CENTRIFUGALIZE CENTRIFUGATION CERTIFICATIONS CHIEFTAINESSES CHIEFTAINSHIPS CHYLIFICATIONS CHYMIFICATIONS CLARIFICATIONS CLASSIFICATION CLASSIFICATORY COALIFICATIONS COCKNIFICATION CONFABULATIONS CONFARREATIONS CONFEDERATIONS CONFIDENTIALLY CONFIGURATIONS CONFIRMABILITY CONFIRMATIONAL CONFLAGRATIONS CONFORMABILITY CONFORMATIONAL CONFRONTATIONS CORNIFICATIONS COTRANSFERRING CRAFTSMANSHIPS DAMNIFICATIONS DANDIFICATIONS DECAFFEINATING DEFEMINISATION DEFEMINIZATION DEFENESTRATING DEFENESTRATION DEFIBRILLATING DEFIBRILLATION DEFIBRILLATORS DEFIBRINATIONS DEFINABILITIES DEFLAGRABILITY DEFLOCCULATING DEFLOCCULATION DEFORESTATIONS DELIRIFACIENTS DENAZIFICATION DENITRIFICATOR DENSIFICATIONS DESULFURATIONS DETOXIFICATION DIAMANTIFEROUS DIFFARREATIONS DIFFERENTIABLE DIFFERENTIALLY DIFFERENTIATED DIFFERENTIATES DIFFERENTIATOR DIFFRACTOMETER DIFFRACTOMETRY DIGNIFICATIONS DINOFLAGELLATE DISAFFILIATING DISAFFILIATION DISAFFIRMATION DISAFFORESTING DISCOMFORTABLE DISFEATUREMENT DISFIGURATIONS DISFORESTATION DISINFESTATION DISINFORMATION DISSATISFIEDLY DRAFTSMANSHIPS DULCIFICATIONS EBURNIFICATION EFFECTUALITIES EFFEMINATENESS EMULSIFICATION ENFORCEABILITY ESTERIFICATION ETHERIFICATION FACTIONALISING FACTIONALIZING FACTIOUSNESSES FACTITIOUSNESS FACTORISATIONS FACTORIZATIONS FAINTHEARTEDLY FAINTISHNESSES FAITHFULNESSES FAITHWORTHIEST FALSIFIABILITY FALSIFICATIONS FANATICISATION FANATICIZATION FANTASTICALITY FANTASTICATING FANTASTICATION FARSIGHTEDNESS FARTHINGSWORTH FASCICULATIONS FASHIONABILITY FASTIDIOUSNESS FATALISTICALLY FATHERLINESSES FATIGABILITIES FATIGUABLENESS FAVORABILITIES FEATHERBEDDING FEATHERBRAINED FEATHERINESSES FEATHERWEIGHTS FEDERALISATION FEDERALIZATION FERMENTABILITY FERMENTATIVELY FERRIMAGNETISM FERROMAGNETISM FERROPRUSSIATE FERTILISATIONS FERTILIZATIONS FETISHISATIONS FETISHIZATIONS FEUDALISATIONS FEUDALIZATIONS FIBROCARTILAGE FIBROSARCOMATA FICTIONALISING FICTIONALITIES FICTIONALIZING FICTIONISATION FICTIONIZATION FIGURABILITIES FIGURATIVENESS FILTERABLENESS FILTRABILITIES FINGERBREADTHS FISSIONABILITY FLABBERGASTING FLAGELLANTISMS FLAGITIOUSNESS FLAMMABILITIES FLEXITARIANISM FLIPPANTNESSES FLOATABILITIES FLOCCILLATIONS FLUNITRAZEPAMS FONCTIONNAIRES FOREORDAINMENT FOREORDINATION FORESEEABILITY FORGEABILITIES FORISFAMILIATE FORMALISATIONS FORMALIZATIONS FORNICATRESSES FORTIFICATIONS FOSSILISATIONS FOSSILIZATIONS FOUNDATIONALLY FOUNDATIONLESS FRACTIONALISED FRACTIONALISES FRACTIONALISMS FRACTIONALISTS FRACTIONALIZED FRACTIONALIZES FRACTIONATIONS FRACTOGRAPHIES FRAGMENTATIONS FRANCHISEMENTS FRANGIBILITIES FRATERNISATION FRATERNIZATION FREQUENTATIONS FREQUENTATIVES FRONTIERSWOMAN FRUCTIFICATION FRUITARIANISMS FUNAMBULATIONS FUNCTIONALISMS FUNCTIONALISTS FUNDAMENTALISM FUNDAMENTALIST FUNDAMENTALITY FUTURISTICALLY GEMEINSCHAFTEN GENTRIFICATION GLORIFICATIONS GRANDFATHERING GRATIFICATIONS HALFWITTEDNESS HANDICRAFTSMAN HANDICRAFTSMEN HORRIFICATIONS HUMIDIFICATION HYPERINFLATION IDENTIFICATION IMPERFORATIONS INARTIFICIALLY INDEFINABILITY INEFFABILITIES INEFFECTUALITY INEFFICACITIES INFALLIBILISTS INFINITESIMALS INFLAMMABILITY INFLAMMATORILY INFLATEDNESSES INFLECTIONALLY INFORMATICIANS INFRANGIBILITY INFRAPOSITIONS INFRASTRUCTURE INTERFERENTIAL INTERFEROGRAMS INTERFOLIATING INTRAFALLOPIAN IRREFUTABILITY JELLIFICATIONS JOLLIFICATIONS JUSTIFIABILITY JUSTIFICATIONS KARSTIFICATION LABEFACTATIONS LAPIDIFICATION LIGNIFICATIONS LIGNOSULFONATE LITHIFICATIONS MAGNIFICATIONS MALFUNCTIONING MANIFESTATIONS MANIFESTNESSES MANUFACTURINGS MASSIFICATIONS MATRESFAMILIAS MELLIFICATIONS METAFICTIONIST METRIFICATIONS MICROFILAMENTS MISINFORMATION MOLLIFICATIONS MORTIFICATIONS MULTIFACTORIAL MULTIFARIOUSLY MULTIFILAMENTS MULTIFOLIOLATE MUMMIFICATIONS MUNDIFICATIONS MUNDIFICATIVES MYSTIFICATIONS NEUROFIBROMATA NITRIFICATIONS NITROPARAFFINS NONFICTIONALLY NONFILAMENTOUS NONFORFEITABLE NONINFORMATION NONSIGNIFICANT NULLIFICATIONS OLFACTOLOGISTS OLFACTOMETRIES OPSONIFICATION OUTFANGTHIEVES OVERFASTIDIOUS OVERINFLATIONS PACIFISTICALLY PALMIFICATIONS PARTURIFACIENT PATRESFAMILIAS PERFECTABILITY PERFECTIBILIAN PERFECTIONATED PERFECTIONATES PERFORMABILITY PERFORMATIVELY PETRIFICATIONS PLEBIFICATIONS PONTIFICATIONS PORNIFICATIONS PREFABRICATING PREFABRICATION PREFABRICATORS PREFERENTIALLY PREFIGURATIONS PREFORMULATING PRESANCTIFYING PRETTIFICATION PREUNIFICATION PROFESSORIATES PROFITABLENESS PROLIFERATIONS PROLIFICATIONS PUTRIFICATIONS QUALIFICATIONS QUALIFICATIVES QUANTIFICATION QUATREFEUILLES QUINQUEFOLIATE QUIZZIFICATION RAREFICATIONAL REAFFIRMATIONS RECODIFICATION RECONFIRMATION RECTIFIABILITY RECTIFICATIONS REFASHIONMENTS REFERENTIALITY REFOCILLATIONS REFORESTATIONS REFORMATIONIST REFORMULATIONS REFRACTIVENESS REFRACTIVITIES REFRACTOMETRIC REFRACTORINESS REFRANGIBILITY REFRIGERATIONS REFUTABILITIES REINFESTATIONS RESINIFICATION RETRANSFERRING RETRANSFORMING REUNIFICATIONS REVIVIFICATION RIGIDIFICATION SANCTIFICATION SANGUIFICATION SAPONIFICATION SATISFACTORILY SCARIFICATIONS SCIENTIFICALLY SCORIFICATIONS SHAPESHIFTINGS SHRINKFLATIONS SIGNIFICATIONS SILICIFICATION SIMPLIFICATION SIMPLIFICATIVE SIMPLIFICATORS SOLIDIFICATION SPAGHETTIFYING SPECIFICATIONS SPIFFLICATIONS SPORTFISHERMAN STAGFLATIONARY STALACTITIFORM STIGMATIFEROUS STRATIFICATION STULTIFICATION SUBINFEUDATING SUBINFEUDATION SUBINFEUDATORY SUFFRAGETTISMS SUFFUMIGATIONS SULFACETAMIDES SULFAMETHAZINE SULFATHIAZOLES SULFURISATIONS SULFURIZATIONS SUPERFETATIONS SUPERFICIALITY SUPERFOETATION TARIFFICATIONS TELEFACSIMILES TESTIFICATIONS TETRAFLUORIDES THURIFICATIONS TRAFFICABILITY TRANSFERENTIAL TRANSFORMATION TRANSFORMATIVE TRANSFORMISTIC TRANSFUSIONIST TRANSMOGRIFIED TRANSMOGRIFIES ULTRAEFFICIENT ULTRAFILTERING ULTRAFILTRATES UNAFFECTIONATE UNARTIFICIALLY UNCERTIFICATED UNDERINFLATION UNDERSTAFFINGS UNFAITHFULNESS UNFLAPPABILITY UNFLATTERINGLY UNFRACTIONATED UNIDENTIFIABLE UNIDENTIFIABLY UNIFORMITARIAN UNQUANTIFIABLE UNQUANTIFIABLY UNREFRIGERATED UNSATISFACTION UNSATISFACTORY UNTHRIFTIHEADS UNTHRIFTYHEADS USUFRUCTUARIES VERBIFICATIONS VERSIFICATIONS VIBROFLOTATION VITRIFIABILITY VITRIFICATIONS WATERFLOODINGS WATERPROOFINGS YUPPIFICATIONS ZINCIFICATIONS ZINCKIFICATION ZINKIFICATIONS ZOMBIFICATIONS