There are 528 twelve-letter words containing A, D, L, N and T, https://www.bestwordlist.com/c/a/5/12letterwordswithadlnt.htm ACCIDENTALLY ACETANILIDES ACIDULATIONS ADAPTATIONAL ADDITIONALLY ADJUNCTIVELY ADJUSTMENTAL ADMINICULATE ADMONITORILY ADOLESCENTLY ADULARESCENT ADULTERATING ADULTERATION ADULTERISING ADULTERIZING ADULTESCENTS ADVENTUREFUL AGGLUTINATED ALDOLISATION ALDOLIZATION ALDOPENTOSES ALDOSTERONES ALEXANDRITES ALLOANTIBODY ALTITUDINOUS AMIANTHOIDAL AMONTILLADOS ANDOUILLETTE ANDROLOGISTS ANECDOTALISM ANECDOTALIST ANISODACTYLS ANTECEDENTLY ANTEDILUVIAL ANTEDILUVIAN ANTEPRANDIAL ANTHOLOGISED ANTHOLOGIZED ANTHROPOIDAL ANTIDILUTION ASTOUNDINGLY AUTODIALLING BATTLEGROUND BATTLEMENTED BEADBLASTING BEDAZZLEMENT BESTRADDLING BIOIDENTICAL BLANDISHMENT BLANKETWEEDS BLOODSTAINED BOATBUILDING CALENDARISTS CANDESCENTLY CANDLELIGHTS CANDLESTICKS CANTILEVERED CARBONYLATED CARDINALATES CARUNCULATED CHARLESTONED CHLORIDATING CHONDROBLAST CLADOGENETIC CLAIRAUDIENT CLAUDICATION COINCIDENTAL COLOQUINTIDA CONCORDANTLY CONDITIONALS CONDUCTIONAL CONDUCTORIAL CONDUPLICATE CONFABULATED CONFIDENTIAL CONFLAGRATED CONSOLIDATED CONSOLIDATES CONSOLIDATOR CONSTELLATED CONTEMPLATED CONTRACTEDLY COORDINATELY COTYLEDONARY COUNTERPLEAD CREDENTIALED CYCLANDELATE DAUGHTERLING DAYLIGHTINGS DEBILITATING DEBILITATION DECELERATING DECELERATION DECENTRALISE DECENTRALIST DECENTRALIZE DECHLORINATE DECLAMATIONS DECLARATIONS DECLINATIONS DECLINATURES DECOLLATIONS DECOLORATING DECOLORATION DECUMULATION DEDICATIONAL DEERSTALKING DEFALCATIONS DEFILIATIONS DEFINABILITY DEFINITIONAL DEFLAGRATING DEFLAGRATION DEFLATIONARY DEFLATIONIST DEFLECTIONAL DEFLOCCULANT DEFLORATIONS DEFOLIATIONS DEGENERATELY DEGLACIATION DEGLUTINATED DEGLUTINATES DELAMINATING DELAMINATION DELASSEMENTS DELECTATIONS DELIBERATING DELIBERATION DELICATENESS DELICATESSEN DELIMITATING DELIMITATION DELINEATIONS DEMODULATING DEMODULATION DEMONOLATERS DEMONSTRABLE DEMONSTRABLY DEMYELINATED DEMYELINATES DENATURALISE DENATURALIZE DENOTATIVELY DENTICULATED DENTILINGUAL DENTIROSTRAL DEOPPILATING DEOPPILATION DEPARTMENTAL DEPLORATIONS DEPLUMATIONS DEPOPULATING DEPOPULATION DEPOSITIONAL DEREGULATING DEREGULATION DERIVATIONAL DESALINATING DESALINATION DESALINATORS DESOLATENESS DESOLATINGLY DESPOLIATION DETAILEDNESS DETASSELLING DETERMINABLE DETERMINABLY DETONABILITY DETRACTINGLY DETRIMENTALS DEVALUATIONS DEVITALISING DEVITALIZING DEVOTIONALLY DIAGNOSTICAL DIALECTICIAN DIALYSATIONS DIALYZATIONS DIATONICALLY DIETHYLAMINE DIFFERENTIAL DIFUNCTIONAL DIGITALISING DIGITALIZING DIGLADIATING DIGLADIATION DILACERATING DILACERATION DILAPIDATING DILAPIDATION DILATATIONAL DILATORINESS DILETTANTISH DILETTANTISM DILUCIDATING DILUCIDATION DIPROPELLANT DISABLEMENTS DISANNULMENT DISCIPLINANT DISCLAMATION DISCONSOLATE DISCORDANTLY DISCOUNTABLE DISCREPANTLY DISCRETIONAL DISCULPATING DISENTAILING DISENTANGLED DISENTANGLES DISENTHRALLS DISENTRAILED DISENTRAYLED DISENTRAYLES DISINFLATION DISLOCATIONS DISMANTLINGS DISMOUNTABLE DISPLACEMENT DISPLEASANTS DISRELATIONS DISTANCELESS DISTILLATION DISTORTIONAL DISTRAINABLE DIVINATORIAL DIVULGATIONS DOCTRINALITY DOCUMENTABLE DOMINATINGLY DONATISTICAL DORSIVENTRAL DORSOVENTRAL DOVETAILINGS DRINKABILITY DUPLICATIONS DYNASTICALLY EDULCORATING EDULCORATION ELATEDNESSES ELUCIDATIONS ENARTHRODIAL ENCAPSULATED ENCULTURATED ENDOSKELETAL ENDOTHELIOMA ENDOTRACHEAL ENDURABILITY ENTERDEALING ENTRAMMELLED ETHNOMEDICAL EVENTUALISED EVENTUALIZED EVIDENTIALLY EXPEDIENTIAL EXTERNALISED EXTERNALIZED FANTASYLANDS FARTHINGLAND FASCINATEDLY FAULTFINDERS FAULTFINDING FLUIDISATION FLUIDIZATION FLUORIDATING FLUORIDATION FOUNDATIONAL FRAUDULENTLY FUNAMBULATED FUNDAMENTALS GANGLIONATED GANGSTERLAND GLADIATORIAN GLYCERINATED GOALTENDINGS HALLUCINATED HEADSTRONGLY HUSBANDLIEST IDEALISATION IDEALIZATION IDEATIONALLY IDENTIFIABLE IDENTIFIABLY IDOLATRISING IDOLATRIZING IDOLISATIONS IDOLIZATIONS IMPEDIMENTAL INADEQUATELY INAUDIBILITY INCAPSULATED INCIDENTALLY INDELICATELY INDETECTABLE INDICATIONAL INDICATIVELY INDISPUTABLE INDISPUTABLY INDOLEACETIC INDUPLICATED INDUSTRIALLY INELABORATED INFANTICIDAL INFANTILISED INFANTILIZED INFATUATEDLY INFLATEDNESS INORDINATELY INSECTICIDAL INTERCALATED INTERDEALERS INTERDEALING INTERDIALECT INTERDIGITAL INTERLACEDLY INTERLARDING INTERLAYERED INTERNALISED INTERNALIZED INTERPLANTED INTERPLEADED INTERPLEADER INTERPOLATED INTERRELATED INTERSTADIAL INTERTANGLED INTERTIDALLY INTRACARDIAL INVALIDATING INVALIDATION INVALIDATORS INVALIDITIES JUDGMENTALLY LABIODENTALS LANDAULETTES LANDGRAVATES LANDGRAVIATE LANDSCAPISTS LANDSKNECHTS LARYNGITIDES LATEENRIGGED LATIFUNDIUMS LATITUDINOUS LAUNDERETTES LEATHERBOUND LEPIDOPTERAN LIQUIDATIONS LONGICAUDATE LONGITUDINAL MALCONTENTED MALEDICTIONS MALIMPRINTED MALTODEXTRIN MANDIBULATED MANDIBULATES MANDOLINISTS MARTELLANDOS MEDICAMENTAL METALLIDINGS MULTIDENTATE MULTIPLICAND NAPHTHALISED NAPHTHALIZED NATIONALISED NATIONALIZED NEANDERTALER NEANDERTHALS NEEDLECRAFTS NIGGARDLIEST NONCUSTODIAL NONDELEGATES NONEDITORIAL NONIDENTICAL NONNUCLEATED NONREGULATED NONSTEROIDAL NUCLEOTIDASE OCCIDENTALLY ODONTOBLASTS ODONTOPHORAL ORIENTALISED ORIENTALIZED OUTGENERALED OUTLANDISHLY OUTVILLAINED OVERINFLATED PALINDROMIST PALUDAMENTUM PASTURELANDS PEDANTICALLY PEDESTALLING PEDICULATION PEDUNCULATED PENINSULATED PENTADACTYLE PENTADACTYLS PENTADACTYLY PENTLANDITES PINNATIFIDLY PLANTIGRADES PLATITUDINAL POSTDEADLINE POSTDILUVIAN POSTPRANDIAL PRECEDENTIAL PREINSTALLED PRESIDENTIAL PRODUCTIONAL PROVIDENTIAL PRUDENTIALLY QUADRIVALENT QUINDECAPLET RADIOELEMENT RALLENTANDOS RATIONALISED RATIONALIZED REDEMPTIONAL REINOCULATED RESTRAINEDLY RETRANSLATED REVALIDATING REVALIDATION ROUNDABOUTLY RUDIMENTALLY SANCTIFIEDLY SANDBLASTERS SANDBLASTING SCINTILLATED SEDIMENTABLE SOUTHLANDERS STADDLESTONE STAKEHOLDING STANDARDLESS STAPHYLINIDS STELLERIDANS STICKHANDLED STICKHANDLER STICKHANDLES STRANDWOLVES STRANGLEHOLD STRANGULATED STRIDULANCES STRIDULANTLY STRIDULATING STRIDULATION STRINGHALTED STUDDINGSAIL SYNADELPHITE SYNDACTYLIES SYNDACTYLISM SYNDACTYLOUS SYNDETICALLY SYNDICALISTS TELECOMMANDS TENDENCIALLY TENDENTIALLY THEATERLANDS THEATRELANDS THOUSANDFOLD THUNDERCLAPS THUNDERFLASH TOWARDLINESS TRANQUILISED TRANQUILIZED TRANSLOCATED TRANSPLANTED TRIANGULATED TRYPANOCIDAL TYRANNICIDAL ULTRADISTANT ULTRAMUNDANE ULTRAREFINED UNACCLIMATED UNADULTERATE UNAFFECTEDLY UNAFFILIATED UNALLEVIATED UNASSISTEDLY UNCALCULATED UNCALIBRATED UNCATALOGUED UNCELEBRATED UNCIRCULATED UNCORRELATED UNCREDITABLE UNCULTIVATED UNDEFEATABLE UNDEFOLIATED UNDELECTABLE UNDELIBERATE UNDERBLANKET UNDERLAYMENT UNDERPLANTED UNDERTAKABLE UNDETECTABLE UNDETECTABLY UNDIPLOMATIC UNDISMANTLED UNDISPUTABLE UNDISPUTABLY UNDULATINGLY UNDUPLICATED UNELABORATED UNENTHRALLED UNFORMULATED UNGUICULATED UNIDEALISTIC UNINOCULATED UNLIQUIDATED UNMETHODICAL UNMYELINATED UNSPECTACLED UNSTIMULATED UNSUBLIMATED UNTRAMMELLED UNTRANSLATED UNVENTILATED VACATIONLAND VALEDICTIONS VALETUDINARY VASODILATION VENTROMEDIAL WALDSTERBENS WILDCATTINGS WINDLESTRAES WINDLESTRAWS ZALAMBDODONT