There are 497 twelve-letter words containing 2A, D, E and I, https://www.bestwordlist.com/c/a/5/12letterwordswithaadei.htm ABECEDARIANS ABSINTHIATED ACADEMICALLY ACADEMICIANS ACADEMICISMS ACCIDENTALLY ACCLIMATISED ACCLIMATIZED ACCORDANCIES ACCREDITABLE ACETANILIDES ACHROMATISED ACHROMATIZED ACIDANTHERAS ACQUITTANCED ADAPTIVENESS ADAPTIVITIES ADENOPATHIES ADJECTIVALLY ADJUDICATIVE ADMINICULATE ADMINISTRATE ADULTERATING ADULTERATION ADVERBIALISE ADVERBIALIZE ADVERGAMINGS ADVERSATIVES ADVERTORIALS AERODYNAMICS AFFRANCHISED AGGLUTINATED AGGRANDISERS AGGRANDIZERS AGUARDIENTES ALDERMANLIER ALDERMANLIKE ALDERMANRIES ALDERMANSHIP ALEXANDRINES ALEXANDRITES ALPHABETISED ALPHABETIZED AMPHIDENTATE ANECDOTALISM ANECDOTALIST ANIMADVERTED ANIMADVERTER ANTEDILUVIAL ANTEDILUVIAN ANTEMERIDIAN ANTEPRANDIAL ANTIACADEMIC ANTIADITISES ANTIANDROGEN ANTICATHODES ANTIDIABETIC ANTIPREDATOR APODEICTICAL APPENDICULAR APPROPRIATED APPROXIMATED ARABINOSIDES ARCHDIOCESAN ARTERIALISED ARTERIALIZED ASCENDANCIES ASSAFOETIDAS ASSASSINATED ASTEROIDEANS ATTENDANCIES BACKPEDALING BACTERICIDAL BALLADEERING BANDEIRANTES BARDOLATRIES BARRAMUNDIES BASTARDLIEST BEADBLASTING BLACKLEADING BRADYKINESIA BREAKDANCING CAESALPINOID CALENDARISED CALENDARISES CALENDARISTS CALENDARIZED CALENDARIZES CALLIGRAPHED CAMARADERIES CANDIDATURES CANNIBALISED CANNIBALIZED CARBAMIDINES CARDBOARDIER CARDINALATES CARDIOMEGALY CARDIOPLEGIA CATALOGUISED CATALOGUIZED CHAMBERMAIDS CLAIRAUDIENT COMPAGINATED CONTAMINATED CRACKBRAINED CURVICAUDATE CYCLOPAEDIAS DAMASCEENING DAMASCENINGS DAMASKEENING DARRAIGNMENT DASTARDLIEST DAYDREAMIEST DAYDREAMINGS DAYDREAMLIKE DEACTIVATING DEACTIVATION DEACTIVATORS DEAMINATIONS DEARTICULATE DEASPIRATING DEASPIRATION DEBARCATIONS DEBARKATIONS DEBARRASSING DECAFFEINATE DECALCOMANIA DECANTATIONS DECAPITALISE DECAPITALIZE DECAPITATING DECAPITATION DECAPITATORS DECASUALISED DECASUALISES DECASUALIZED DECASUALIZES DECASYLLABIC DECLAMATIONS DECLARATIONS DEDICATIONAL DEDICATORIAL DEDRAMATISED DEDRAMATISES DEDRAMATIZED DEDRAMATIZES DEFAECATIONS DEFALCATIONS DEFAMATORILY DEFLAGRATING DEFLAGRATION DEFLATIONARY DEFRAUDATION DEGLACIATION DEGRADATIONS DELAMINATING DELAMINATION DEMARCATIONS DEMARKATIONS DEMOCRATICAL DEMONIACALLY DEMONOMANIAS DENATURALISE DENATURALIZE DENATURATION DEPRAVATIONS DERACIALISED DERACIALISES DERACIALIZED DERACIALIZES DERACINATING DERACINATION DERIVATIONAL DERMABRASION DERMAPLANING DESACRALISED DESACRALISES DESACRALIZED DESACRALIZES DESALINATING DESALINATION DESALINATORS DESATURATING DESATURATION DESQUAMATING DESQUAMATION DESQUAMATIVE DEUTERANOPIA DEVALUATIONS DEVASTATIONS DEXTROCARDIA DIAGNOSEABLE DIAGONALISED DIAGONALISES DIAGONALIZED DIAGONALIZES DIAGRAMMABLE DIALECTICIAN DIAMAGNETISM DIATESSARONS DIATHERMANCY DIATOMACEOUS DIAZOMETHANE DIBRANCHIATE DICARPELLARY DILACERATING DILACERATION DISACCHARIDE DISADVANTAGE DISAFFILIATE DISAGGREGATE DISAGREEABLE DISAGREEABLY DISALLOWABLE DISALLOWANCE DISAMBIGUATE DISANALOGIES DISAPPEARING DISARMAMENTS DISASSOCIATE DISCALCEATES DISEMBARRASS DISPLACEABLE DISPLEASANCE DISPLEASANTS DISTRACTABLE DISTRAINABLE DIVARICATELY DODECAGYNIAN DRACONTIASES DRAMATISABLE DRAMATIZABLE DRAMATURGIES DRAPEABILITY DUNIEWASSALS DUNNIEWASSAL DYSAESTHESIA DYSPAREUNIAS EMPARADISING ENARTHRODIAL ENCARNALISED ENCARNALIZED ENDOPARASITE ENGARLANDING EQUIBALANCED ERADICATIONS EUTHANATISED EUTHANATIZED EXTRADITABLE FAINTHEARTED FAMILIARISED FAMILIARIZED FASCICULATED FASCINATEDLY FOUNTAINHEAD FRACTIONATED GALACTOSIDES GALLIARDISES GALRAVITCHED GANGLIONATED GEODYNAMICAL GRADUALITIES GRADUATESHIP GRANDDADDIES GRANDPAPPIES HAEMODYNAMIC HAIRBREADTHS HAIRSBREADTH HALLUCINATED HANDICAPPERS HANDICRAFTER HARLEQUINADE HARUSPICATED HEADBANGINGS HEADREACHING HERALDICALLY HEREDITARIAN HEXADACTYLIC HEXADECANOIC HEXADECIMALS HEXAGRAMMOID HOLIDAYMAKER HOLLANDAISES HYDRALAZINES HYPNOPAEDIAS HYRACOIDEANS IDEALISATION IDEALIZATION IDEATIONALLY INADEQUACIES INADEQUATELY INCAPSULATED INCARCERATED INCARDINATED INCARDINATES INCARNADINED INCARNADINES INELABORATED INERADICABLE INERADICABLY INFATUATEDLY INSTAGRAMMED INSTANTIATED INTERCALATED INTERSTADIAL INTRAMUNDANE IRRADIANCIES LABIODENTALS LABRADORITES LAGGARDLIEST LANDGRAVIATE LANDGRAVINES LOADSAMONIES LOGODAEDALIC LONGICAUDATE MACADAMISERS MACADAMIZERS MACHICOLATED MADEFACTIONS MADERISATION MADERIZATION MADREPORIANS MAENADICALLY MAIDSERVANTS MAINSTREAMED MAINTENANCED MALADJUSTIVE MANDARINATES MANDIBULATED MANDIBULATES MANSPREADING MARGINALISED MARGINALIZED MARISCHALLED MARIVAUDAGES MASQUERADING MATERIALISED MATERIALIZED MATHEMATISED MATHEMATIZED MATRICULATED MEDIAEVALISM MEDIAEVALIST MEDICAMENTAL MEGALOCARDIA MELODRAMATIC METASTASISED METASTASIZED METHANAMIDES MICROMANAGED MISALLOCATED MISCATALOGED MISDEMEANANT MISEVALUATED MULTIWARHEAD MURDERABILIA NAPHTHALISED NAPHTHALIZED NATIONALISED NATIONALIZED NEOPAGANISED NEOPAGANIZED NIACINAMIDES NONACADEMICS NONACTIVATED NONCANDIDATE NORADRENALIN OUTBARGAINED OVERDRAMATIC PACHYDERMIAS PAEDERASTIES PAEDIATRISTS PAEDOBAPTISM PAEDOBAPTIST PAEDOLOGICAL PAEDOPHILIAC PAEDOPHILIAS PANDAEMONIUM PANDEMONIANS PARADOXURINE PARALLELISED PARALLELIZED PARAMEDICALS PARAMETRISED PARAMETRIZED PARAPERIODIC PARASCENDING PARASITICIDE PARASPHENOID PARASUICIDES PARFOCALISED PARFOCALIZED PARTICIPATED PASQUINADERS PEDANTICALLY PEDIATRICIAN PEDICELLARIA PLANTIGRADES PREVARICATED PROPAGANDISE PROPAGANDIZE PTERIDOMANIA QUADRAPLEGIA QUADRAPLEGIC QUADRATRICES QUADRATRIXES QUADRENNIALS QUADRIENNIAL QUADRIPLEGIA QUADRIVALENT RADICALITIES RADIESTHESIA RADIOGRAPHED RADIOGRAPHER RADIOLABELED RADIOTHERAPY RADIOTRACERS RATIOCINATED RATIONALISED RATIONALIZED REACCLIMATED REACQUAINTED READAPTATION READMITTANCE RECALIBRATED REINCARNATED REMAINDERMAN RERADIATIONS RETARDANCIES RETARDATIONS REVACCINATED REVALIDATING REVALIDATION RIJKSDAALERS SACCHARIFIED SAFEGUARDING SAILBOARDERS SALAMANDRINE SALICYLAMIDE SALMAGUNDIES SANCTUARISED SANCTUARIZED SANDPAPERIER SANDPAPERING SAPINDACEOUS SCANDALISERS SCANDALIZERS SCARABAEOIDS SEMIPALMATED SPEARHEADING STANDARDISED STANDARDISER STANDARDISES STANDARDIZED STANDARDIZER STANDARDIZES STENOCARDIAS SUBDIACONATE SULFADIAZINE SYLLABICATED TARRADIDDLES TRADEMARKING TRADESCANTIA TRIANGULATED TRIRADIATELY TRYPARSAMIDE UNACCLIMATED UNACQUAINTED UNAFFILIATED UNALLEVIATED UNASSOCIATED UNBARRICADED UNBARRICADES UNCALIBRATED UNCAPTIVATED UNDRAMATISED UNDRAMATIZED UNHABITUATED UNIRRADIATED UNMAINTAINED UNVACCINATED UNVARIEGATED VAGABONDISED VAGABONDISES VAGABONDIZED VAGABONDIZES VALETUDINARY VASCULARISED VASCULARIZED VAUDEVILLEAN VAUDEVILLIAN VOCABULARIED WAKEBOARDING WALDGRAVINES WALLYDRAIGLE WITHDRAWABLE ZANTEDESCHIA