There are 467 fourteen-letter words containing A, E, N and V, https://www.bestwordlist.com/c/a/4/14letterwordswithaenv.htm
ABORTIVENESSES ABRASIVENESSES ABSORPTIVENESS ADAPTIVENESSES ADHESIVENESSES
ADMINISTRATIVE ADVANTAGEOUSLY ADVENTITIOUSLY ADVERBIALISING ADVERBIALIZING
ADVERTISEMENTS ADVERTIZEMENTS AGGRESSIVENESS ALIMENTIVENESS ALLUSIVENESSES
ANIMADVERSIONS ANTEDILUVIALLY ANTICIPATIVELY ANTICONVULSIVE ANTICORROSIVES
ANTIDERIVATIVE ANTIEVOLUTIONS ANTIGOVERNMENT ANTINARRATIVES ANTIREFLECTIVE
ANTIRESORPTIVE ANTIRETROVIRAL ANTISUBVERSION ANTISUBVERSIVE ANTIUNIVERSITY
APPREHENSIVELY ASSAULTIVENESS ASSEVERATINGLY ATTRACTIVENESS AUGMENTATIVELY
AVARICIOUSNESS AVERRUNCATIONS AVERSIVENESSES AVOWABLENESSES AVUNCULARITIES
BIOEQUIVALENCE BOUGAINVILLAEA BOUGAINVILLEAS CADAVEROUSNESS CARDIOVERSIONS
CHIVALROUSNESS CIRCUMNAVIGATE CLAIRVOYANCIES COEVOLUTIONARY COGITATIVENESS
COINVESTIGATOR CONCEIVABILITY CONGLOMERATIVE CONGLUTINATIVE CONGRATULATIVE
CONSERVATIONAL CONSERVATISING CONSERVATIVELY CONSERVATIZING CONSERVATOIRES
CONSERVATORIAL CONSERVATORIES CONSERVATORIUM CONSERVATRICES CONSERVATRIXES
CONSULTATIVELY CONTEMPLATIVES CONTINUATIVELY CONTRACEPTIVES CONTRAGESTIVES
CONTRAPOSITIVE CONTRAVENTIONS CONVALESCENCES CONVALESCENTLY CONVENTIONALLY
CONVERSATIONAL CONVERSAZIONES CONVERTAPLANES CONVERTIPLANES CONVERTOPLANES
CONVIVIALITIES COUNTERVAILING CREATIVENESSES CUMULATIVENESS CURATIVENESSES
CURVACEOUSNESS CURVACIOUSNESS CURVILINEARITY DATAVEILLANCES DECEIVABLENESS
DECORATIVENESS DEMONSTRATIVES DENOMINATIVELY DEPRAVEDNESSES DERIVATIONALLY
DERIVATIONISTS DERIVATISATION DERIVATIVENESS DERIVATIZATION DETERMINATIVES
DEVALORISATION DEVALORIZATION DEVITALISATION DEVITALIZATION DEVOTIONALISTS
DEVOTIONALNESS DISADVENTUROUS DISCRIMINATIVE DISINTEGRATIVE DISINVIGORATED
DISINVIGORATES DISPENSATIVELY DISPURVEYANCES DISSEVERATIONS DISSUASIVENESS
DORSIVENTRALLY DORSOVENTRALLY EAVESDROPPINGS ELECTROVALENCE ELECTROVALENCY
ELIMINATIVISMS ENDEAVOURMENTS ENVENOMISATION ENVENOMIZATION ENVIABLENESSES
EQUIVOCATINGLY EVANGELIARIONS EVANGELIARIUMS EVANGELICALISM EVANGELISATION
EVANGELIZATION EVENHANDEDNESS EVERYDAYNESSES EVOLUTIONARILY EXHAUSTIVENESS
EXTRAVAGANCIES EXTRAVAGATIONS EXTRAVASATIONS FAVOURABLENESS FAVOUREDNESSES
FERMENTATIVELY FIGURATIVENESS FREQUENTATIVES GALVANOMETRIES GALVANOSCOPIES
GOVERNABLENESS GOVERNMENTALLY HANDKERCHIEVES HEAVENLINESSES HYPERVENTILATE
HYPERVIGILANCE IMMOVEABLENESS IMMUNOREACTIVE IMPERATIVENESS IMPROVABLENESS
INACTIVENESSES INADVERTENCIES INAPPRECIATIVE INAPPREHENSIVE INCONCEIVABLES
INDISCOVERABLE INDIVIDUALISED INDIVIDUALISER INDIVIDUALISES INDIVIDUALIZED
INDIVIDUALIZER INDIVIDUALIZES INEVITABLENESS INGRAVESCENCES INHABITIVENESS
INNOVATIVENESS INOBSERVATIONS INTERAVAILABLE INTERBEHAVIORS INTERBEHAVIOUR
INTERCLAVICLES INTEROPERATIVE INTERPRETATIVE INTERROGATIVES INTERVALOMETER
INTERVENTIONAL INTERVERTEBRAL INTERWEAVEMENT INTRANSITIVELY INVALUABLENESS
INVARIABLENESS INVASIVENESSES INVESTIGATIONS INVETERATENESS INVIABLENESSES
INVIGORATIVELY INVIOLABLENESS INVOLUCELLATED IRRELATIVENESS LAEVOROTATIONS
LASCIVIOUSNESS LATEROVERSIONS LAXATIVENESSES LIVEABLENESSES LOVEABLENESSES
MACHIAVELLIANS MACROEVOLUTION MANIPULATIVELY MARVELLOUSNESS MEDITATIVENESS
METANARRATIVES MISADVENTURERS MISADVENTUROUS MISADVERTENCES MISADVISEDNESS
MISEVALUATIONS MISGOVERNANCES MISGOVERNAUNCE MISOBSERVANCES MOVEABLENESSES
MULTIVALENCIES MUNDIFICATIVES NAVIGABILITIES NEGATIVENESSES NONACHIEVEMENT
NONACQUISITIVE NONASSERTIVELY NONBEHAVIOURAL NONCOMMUTATIVE NONCOOPERATIVE
NONDERIVATIVES NONEQUIVALENCE NONEQUIVALENTS NONINTERACTIVE NONOBSERVANCES
NONOVERLAPPING NONRADIOACTIVE NONRECOVERABLE NONRETROACTIVE NONSPECULATIVE
NONVEGETARIANS NONVOLUNTARIES NOVELISTICALLY OBJECTIVATIONS OBSERVABLENESS
ONCORNAVIRUSES OPINIONATIVELY OUTFANGTHIEVES OUTMANEUVERING OUTMANOEUVRING
OVERABUNDANCES OVERABUNDANTLY OVERACCENTUATE OVERADJUSTMENT OVERANALYTICAL
OVERASSERTIONS OVERASSESSMENT OVERATTENTIONS OVERBREATHINGS OVERCENTRALISE
OVERCENTRALIZE OVERCOMPENSATE OVERCOMPLIANCE OVERDECORATING OVERDECORATION
OVERDIAGNOSING OVERDOMINANCES OVEREDUCATIONS OVERENCOURAGED OVERENCOURAGES
OVERENTHUSIASM OVERESTIMATING OVERESTIMATION OVEREVALUATING OVEREVALUATION
OVEREXPANSIONS OVEREXPLAINING OVEREXTRACTION OVERGENERALISE OVERGENERALIZE
OVERHARVESTING OVERIDEALISING OVERIDEALIZING OVERINFLATIONS OVERINSURANCES
OVERMANAGEMENT OVERMEDICATING OVERMEDICATION OVERORGANISING OVERORGANIZING
OVERORNAMENTED OVERPEDALLINGS OVERPERSUADING OVERPERSUASION OVERPOPULATING
OVERPOPULATION OVERPROGRAMING OVERRASHNESSES OVERREGULATING OVERREGULATION
OVERSATURATING OVERSATURATION OVERSTATEMENTS OVERTREATMENTS OVERVALUATIONS
OVERWEATHERING PENTAVALENCIES PERSEVERATIONS PERSUASIVENESS PHOTOENGRAVERS
PHOTOENGRAVING PICORNAVIRUSES PREDESTINATIVE PREDEVALUATION PREVARICATIONS
PREVENTABILITY PROVABLENESSES PROVENTRICULAR PROVIDENTIALLY PROVINCIALISED
PROVINCIALISES PROVINCIALIZED PROVINCIALIZES PROVISIONARIES PULVERISATIONS
PULVERIZATIONS QUADRIVALENCES QUANTITATIVELY QUANTIVALENCES QUINQUEVALENCE
QUINQUEVALENCY QUINQUIVALENCE QUINQUIVALENCY RADIOSENSITIVE RAVENOUSNESSES
REACTIVENESSES RECEIVABLENESS RECONVALESCENT RECONVALESCING RECULTIVATIONS
REDELIVERANCES REDINTEGRATIVE REFRACTIVENESS REGENERATIVELY REINNERVATIONS
REINVESTIGATED REINVESTIGATES REINVIGORATING REINVIGORATION REINVIGORATORS
RELATIVENESSES RELATIVISATION RELATIVIZATION REMUNERATIVELY REPRESENTATIVE
RESERVATIONIST RESOLVABLENESS REVACCINATIONS REVALORISATION REVALORIZATION
REVELATIONISTS REVENDICATIONS REVERBERATIONS REVERSIONARIES REVINDICATIONS
REVITALISATION REVITALIZATION REVIVIFICATION SALVABLENESSES SAVEABLENESSES
SEPARATIVENESS SERONEGATIVITY SEROPREVALENCE SERVOMECHANISM SOLVABLENESSES
SOVIETISATIONS SOVIETIZATIONS SUBSTANTIATIVE SUBSTANTIVISED SUBSTANTIVISES
SUBSTANTIVIZED SUBSTANTIVIZES SUPERELEVATING SUPERELEVATION SUPEROVULATING
SUPEROVULATION TELEVANGELICAL TELEVANGELISMS TELEVANGELISTS TELEVISIONALLY
TENDOVAGINITIS TERGIVERSATING TERGIVERSATION TETRAVALENCIES TRANSFORMATIVE
TRANSITIVENESS TRANSITIVITIES TRANSMIGRATIVE TRANSMISSIVELY TRANSVERSALITY
TRANSVERSENESS TRANSVESTITISM ULTRAEXPENSIVE ULTRASENSITIVE ULTRAVIOLENCES
UNAGGRESSIVELY UNAMBIVALENTLY UNAPPRECIATIVE UNAPPREHENSIVE UNATTRACTIVELY
UNAVAILINGNESS UNCONVENTIONAL UNCULTIVATABLE UNDERACHIEVERS UNDERACHIEVING
UNDERLEVERAGED UNDERVALUATION UNDISCOVERABLE UNDISCOVERABLY UNIVERSALISING
UNIVERSALISTIC UNIVERSALITIES UNIVERSALIZING UNIVERSITARIAN UNPERSUASIVELY
UNREMUNERATIVE UNSAVORINESSES UNVANQUISHABLE VALEDICTORIANS VALERIANACEOUS
VALETUDINARIAN VALETUDINARIES VALUABLENESSES VAPORISHNESSES VAPOROUSNESSES
VARIABLENESSES VECTORISATIONS VECTORIZATIONS VEGETARIANISMS VEGETATIVENESS
VENERABILITIES VENERATIVENESS VENEREOLOGICAL VERBALISATIONS VERBALIZATIONS
VERBIFICATIONS VERBIGERATIONS VERIFIABLENESS VERMICULATIONS VERNACULARISED
VERNACULARISES VERNACULARISMS VERNACULARISTS VERNACULARIZED VERNACULARIZES
VERNALISATIONS VERNALIZATIONS VERSIFICATIONS VERTICALNESSES VERTICILLATION
VIGILANTNESSES VILLAINOUSNESS VINDICATRESSES VIOLABLENESSES VITATIVENESSES
VIVIPAROUSNESS VOIDABLENESSES VOLATILENESSES VOUCHSAFEMENTS VRAISEMBLANCES
VULNERABLENESS WAVERINGNESSES