There are 417 fourteen-letter words containing A, F, N and S, https://www.bestwordlist.com/c/a/4/14letterwordswithafns.htm ABORTIFACIENTS ABSORBEFACIENT ACETIFICATIONS ACIDIFICATIONS AFFECTEDNESSES AFFECTLESSNESS AFFENPINSCHERS AFFLUENTNESSES AFFORESTATIONS AFFREIGHTMENTS AFTERSENSATION AIRCRAFTSWOMAN AIRCRAFTSWOMEN AMPLIFICATIONS ANGUSTIFOLIATE ANTIFEDERALIST ANTIFILIBUSTER ANTIFOREIGNERS ANTIFORMALISMS ANTIFORMALISTS ANTISCIENTIFIC ARTIFICIALNESS AUTOINFECTIONS BEATIFICATIONS BENEFACTRESSES BENEFICIALNESS BENEFICIATIONS BIOINFORMATICS BLAMEFULNESSES BLANKETFLOWERS BOASTFULNESSES BRASSFOUNDINGS BREASTFEEDINGS CALCIFICATIONS CANDLESNUFFERS CAPRIFICATIONS CAREFREENESSES CARNIFICATIONS CENTRIFUGALISE CERTIFICATIONS CHIEFTAINESSES CHIEFTAINSHIPS CHYLIFICATIONS CHYMIFICATIONS CIPROFLOXACINS CLARIFICATIONS CLASSIFICATION COALIFICATIONS COLOURFASTNESS CONFABULATIONS CONFARREATIONS CONFEDERATIONS CONFESSIONALLY CONFIGURATIONS CONFLAGRATIONS CONFRONTATIONS CONTRAFAGOTTOS CORNIFICATIONS COTRANSFERRING CRAFTSMANSHIPS CYCLOPARAFFINS DAMNIFICATIONS DANDIFICATIONS DEFEASIBLENESS DEFEMINISATION DEFENESTRATING DEFENESTRATION DEFIBRINATIONS DEFINABILITIES DEFORESTATIONS DELIRIFACIENTS DENSIFICATIONS DESULFURATIONS DIAMANTIFEROUS DIAMONDIFEROUS DIEFFENBACHIAS DIFFARREATIONS DIFFERENTIATES DIGNIFICATIONS DISAFFILIATING DISAFFILIATION DISAFFIRMANCES DISAFFIRMATION DISAFFORESTING DISCONFORMABLE DISDAINFULNESS DISENFRANCHISE DISFEATUREMENT DISFIGURATIONS DISFORESTATION DISFRANCHISING DISINFESTATION DISINFORMATION DISYLLABIFYING DRAFTSMANSHIPS DREADFULNESSES DREAMFULNESSES DULCIFICATIONS DWARFISHNESSES EFFEMINATENESS EMULSIFICATION ESTERIFICATION EXTRAFORANEOUS FABULOUSNESSES FACELESSNESSES FACINOROUSNESS FACTIONALISING FACTIOUSNESSES FACTITIOUSNESS FACTORISATIONS FACTORIZATIONS FAINTISHNESSES FAITHFULNESSES FALLACIOUSNESS FALLIBLENESSES FALSIFICATIONS FAMILIARNESSES FANATICISATION FANCIFULNESSES FANTASTICALITY FANTASTICATING FANTASTICATION FARCICALNESSES FARFETCHEDNESS FARSIGHTEDNESS FARTHINGSWORTH FASCICULATIONS FASHIONABILITY FASHIONMONGERS FASHIONMONGING FASHIOUSNESSES FASTIDIOUSNESS FATHERLESSNESS FATHERLINESSES FATHOMLESSNESS FATIGUABLENESS FAVOURABLENESS FAVOUREDNESSES FEARLESSNESSES FEARMONGERINGS FEARSOMENESSES FEASIBLENESSES FEATHERINESSES FEDERALISATION FERRICYANOGENS FERRIMAGNETISM FERROCYANOGENS FERROMAGNESIAN FERROMAGNETISM FERROMANGANESE FERTILISATIONS FERTILIZATIONS FETISHISATIONS FETISHIZATIONS FEUDALISATIONS FEUDALIZATIONS FICTIONALISING FICTIONALITIES FICTIONISATION FIGURATIVENESS FILTERABLENESS FINEABLENESSES FINGERBREADTHS FISSIONABILITY FLABBERGASTING FLAGELLANTISMS FLAGELLOMANIAS FLAGITIOUSNESS FLAGRANTNESSES FLAVOPURPURINS FLAWLESSNESSES FLEXITARIANISM FLIPPANTNESSES FLOCCILLATIONS FLUNITRAZEPAMS FONCTIONNAIRES FORAMINIFERANS FORAMINIFEROUS FOREHANDEDNESS FORESHADOWINGS FORESTALLMENTS FORMALISATIONS FORMALIZATIONS FORMIDABLENESS FORNICATRESSES FORSAKENNESSES FORTIFICATIONS FOSSILISATIONS FOSSILIZATIONS FOUNDATIONLESS FOURSQUARENESS FRACTIONALISED FRACTIONALISES FRACTIONALISMS FRACTIONALISTS FRACTIONALIZES FRACTIONATIONS FRAGMENTATIONS FRAGRANTNESSES FRANCHISEMENTS FRANGIBILITIES FRATERNISATION FRAUDULENTNESS FREAKISHNESSES FREEHANDEDNESS FREQUENTATIONS FREQUENTATIVES FRINGILLACEOUS FRONTIERSWOMAN FRUITARIANISMS FUNAMBULATIONS FUNCTIONALISMS FUNCTIONALISTS FUNDAMENTALISM FUNDAMENTALIST GEMEINSCHAFTEN GESELLSCHAFTEN GLANDULIFEROUS GLORIFICATIONS GRACEFULNESSES GRATEFULNESSES GRATIFICATIONS HALFWITTEDNESS HANDICRAFTSMAN HANDICRAFTSMEN HORRIFICATIONS IMPERFORATIONS INEFFABILITIES INEFFICACITIES INFALLIBILISMS INFALLIBILISTS INFALLIBLENESS INFAMOUSNESSES INFEASIBLENESS INFINITESIMALS INFLATEDNESSES INFORMATICIANS INFRALAPSARIAN INFRAPOSITIONS INFRASTRUCTURE INSIGNIFICANCE INSIGNIFICANCY INTERFEROGRAMS JELLIFICATIONS JOLLIFICATIONS JUSTIFICATIONS KARSTIFICATION LABEFACTATIONS LEAFLESSNESSES LIGNIFICATIONS LIGNOSULFONATE LITHIFICATIONS LOATHFULNESSES MAGNIFICATIONS MANIFESTATIONS MANIFESTNESSES MANIFOLDNESSES MANUFACTURINGS MASSIFICATIONS MEANINGFULNESS MELLIFICATIONS METAFICTIONIST METRIFICATIONS MICROFILAMENTS MISCLASSIFYING MISINFORMATION MODIFIABLENESS MOLLIFICATIONS MORTIFICATIONS MULTIFILAMENTS MUMMIFICATIONS MUNDIFICATIONS MUNDIFICATIVES MYSTIFICATIONS NEUROFEEDBACKS NEWFANGLEDNESS NITRIFICATIONS NITROPARAFFINS NONCLASSIFIEDS NONFILAMENTOUS NONFISSIONABLE NONSIGNIFICANT NULLIFICATIONS OPSONIFICATION OUTFANGTHIEVES OVERINFLATIONS PALMIFICATIONS PARAINFLUENZAS PASSIONFLOWERS PEACEFULNESSES PERFECTIONATES PETRIFICATIONS PLEBIFICATIONS PONTIFICATIONS PORNIFICATIONS PREFERABLENESS PREFIGURATIONS PRESANCTIFYING PROFESSIONALLY PROFITABLENESS PROLIFERATIONS PROLIFICATIONS PUTRIFICATIONS QUALIFICATIONS QUINQUEFARIOUS REAFFIRMATIONS RECTIFICATIONS REFASHIONMENTS REFOCILLATIONS REFORESTATIONS REFORMATIONIST REFORMULATIONS REFRACTIVENESS REFRACTORINESS REFRIGERATIONS REINFESTATIONS REMANUFACTURES RESINIFICATION RETRANSFERRING RETRANSFORMING REUNIFICATIONS SANCTIFICATION SANGUIFICATION SAPONIFICATION SCARIFICATIONS SCHADENFREUDES SCIENTIFICALLY SCORIFICATIONS SELFSAMENESSES SHAMEFACEDNESS SHAMEFULNESSES SHAPESHIFTINGS SHRINKFLATIONS SIGNIFICANCIES SIGNIFICATIONS SILICIFICATION SIMPLIFICATION SOFTHEADEDNESS SOLIDIFICATION SOLIFIDIANISMS SPAGHETTIFYING SPECIFICATIONS SPIFFLICATIONS SPORTFISHERMAN STAGFLATIONARY STEDFASTNESSES STOMACHFULNESS STRATIFICATION STULTIFICATION SUBCLASSIFYING SUBINFEUDATING SUBINFEUDATION SUBINFEUDATORY SUFFERABLENESS SUFFRAGANSHIPS SUFFUMIGATIONS SULFADIMIDINES SULFAMETHAZINE SULFANILAMIDES SULFINPYRAZONE SULFONMETHANES SULFURISATIONS SULFURIZATIONS SUPERFETATIONS SUPERFOETATION SYNCHROFLASHES TABLESPOONFULS TABLESPOONSFUL TARIFFICATIONS TASTEFULNESSES TESTIFICATIONS THANKFULNESSES THENCEFORWARDS THUNDERFLASHES THURIFICATIONS TRANSFERENTIAL TRANSFORMATION TRANSFORMATIVE TRANSFORMISTIC TRANSFUSIONIST TRANSMOGRIFIED TRANSMOGRIFIES UNAFFECTEDNESS UNCLASSIFIABLE UNCLASSIFIABLY UNDERSTAFFINGS UNFADINGNESSES UNFAITHFULNESS UNFASHIONABLES UNGRACEFULNESS UNGRATEFULNESS UNLAWFULNESSES UNPROFESSIONAL UNSATISFACTION UNSATISFACTORY UNSPECIFICALLY UNTHANKFULNESS UNTHRIFTIHEADS UNTHRIFTYHEADS UNTRANSFERABLE UNWATCHFULNESS VERBIFICATIONS VERIFIABLENESS VERSIFICATIONS VITRIFICATIONS VOUCHSAFEMENTS WASTEFULNESSES WATCHFULNESSES WATERFLOODINGS WATERPROOFINGS WATERPROOFNESS WEARIFULNESSES WRATHFULNESSES YUPPIFICATIONS ZINCIFICATIONS ZINKIFICATIONS ZOMBIFICATIONS