There are 765 twelve-letter words containing 2A, D and I, https://www.bestwordlist.com/c/a/4/12letterwordswithaadi.htm ABECEDARIANS ABSINTHIATED ACADEMICALLY ACADEMICIANS ACADEMICISMS ACARIDOMATIA ACARODOMATIA ACCIDENTALLY ACCLIMATISED ACCLIMATIZED ACCORDANCIES ACCREDITABLE ACETANILIDES ACHLORHYDRIA ACHROMATISED ACHROMATIZED ACIDANTHERAS ACIDULATIONS ACQUITTANCED ADAPTABILITY ADAPTATIONAL ADAPTIVENESS ADAPTIVITIES ADDITIONALLY ADENOPATHIES ADIAPHORISMS ADIAPHORISTS ADJECTIVALLY ADJUDICATING ADJUDICATION ADJUDICATIVE ADJUDICATORS ADJUDICATORY ADMINICULATE ADMINISTRANT ADMINISTRATE ADMIRABILITY ADMIRALSHIPS ADOPTABILITY ADOPTIANISMS ADOPTIANISTS ADULTERATING ADULTERATION ADUMBRATIONS ADVERBIALISE ADVERBIALIZE ADVERGAMINGS ADVERSATIVES ADVERTORIALS ADVISABILITY AERODYNAMICS AFFICIONADOS AFFRANCHISED AGATHODAIMON AGGLUTINATED AGGRADATIONS AGGRANDISERS AGGRANDISING AGGRANDIZERS AGGRANDIZING AGUARDIENTES AIRBOARDINGS ALDERMANLIER ALDERMANLIKE ALDERMANRIES ALDERMANSHIP ALDOLISATION ALDOLIZATION ALEXANDRINES ALEXANDRITES ALLOANTIBODY ALPHABETISED ALPHABETIZED ALPROSTADILS AMIANTHOIDAL AMONTILLADOS AMPHIDENTATE AMYGDALOIDAL ANAPHRODISIA ANECDOTALISM ANECDOTALIST ANIMADVERTED ANIMADVERTER ANISODACTYLS ANODISATIONS ANODIZATIONS ANTEDILUVIAL ANTEDILUVIAN ANTEMERIDIAN ANTEPRANDIAL ANTHROPOIDAL ANTIACADEMIC ANTIADITISES ANTIANDROGEN ANTICATHODES ANTIDANDRUFF ANTIDIABETIC ANTIDOGMATIC ANTIOXIDANTS ANTIPREDATOR APHRODISIACS APODEICTICAL APPENDICULAR APPLAUDINGLY APPROPRIATED APPROXIMATED ARABINOSIDES ARCHDIOCESAN ARTERIALISED ARTERIALIZED ARTIODACTYLS ASCENDANCIES ASSAFOETIDAS ASSASSINATED ASTEROIDEANS ATTENDANCIES AUDIOLOGICAL AUDIOVISUALS AUDITABILITY AUTOANTIBODY AUTODIALLING AUTODIDACTIC AUTOXIDATION BACKPADDLING BACKPEDALING BACTERICIDAL BALLADEERING BALLHANDLING BANDEIRANTES BARDOLATRIES BARODYNAMICS BARRAMUNDIES BARRICADOING BASIDIOCARPS BASTARDISING BASTARDIZING BASTARDLIEST BASTINADOING BEADBLASTING BIODYNAMICAL BIOHAZARDOUS BIQUADRATICS BLACKLEADING BOARDSAILING BOARDSAILORS BODDHISATTVA BODHISATTVAS BRADYCARDIAC BRADYCARDIAS BRADYKINESIA BRAGGADOCIOS BREAKDANCING BROADCASTING CAESALPINOID CALENDARISED CALENDARISES CALENDARISTS CALENDARIZED CALENDARIZES CALLIGRAPHED CAMARADERIES CANDIDATURES CANNABIDIOLS CANNABINOIDS CANNIBALISED CANNIBALIZED CANTHARIDIAN CANTHARIDINS CARBAMIDINES CARBONADOING CARDBOARDIER CARDINALATES CARDINALSHIP CARDIOGRAPHS CARDIOGRAPHY CARDIOMEGALY CARDIOPLEGIA CARDSHARPING CATADIOPTRIC CATALOGUISED CATALOGUIZED CATHODICALLY CHAMBERMAIDS CLAIRAUDIENT CLAPBOARDING CLAUDICATION COADAPTATION COADUNATIONS COMPAGINATED CONTAMINATED CRACKBRAINED CURVICAUDATE CYANIDATIONS CYCLOPAEDIAS DACTYLICALLY DAMASCEENING DAMASCENINGS DAMASKEENING DAMASQUINING DARMSTADTIUM 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 DIABOLICALLY DIAGNOSEABLE DIAGNOSTICAL DIAGONALISED DIAGONALISES DIAGONALIZED DIAGONALIZES DIAGRAMMABLE DIAGRAMMATIC DIALECTICIAN DIALOGICALLY DIALYSATIONS DIALYTICALLY DIALYZATIONS DIAMAGNETISM DIAMONDBACKS DIAPHANOUSLY DIAPHRAGMING DIAPOPHYSIAL DIARTHRODIAL DIATESSARONS DIATHERMANCY DIATOMACEOUS DIATONICALLY DIAZOMETHANE DIBRANCHIATE DICARPELLARY DIDACTICALLY DIGLADIATING DIGLADIATION DIGLADIATORS DILACERATING DILACERATION DILAPIDATING DILAPIDATION DILAPIDATORS DILATABILITY DILATATIONAL DIPLOCARDIAC DIPLOMATICAL DIPSOMANIACS DISACCHARIDE DISACCHARIDS DISACCORDANT DISADVANCING DISADVANTAGE DISAFFILIATE DISAGGREGATE DISAGREEABLE DISAGREEABLY DISALLOWABLE DISALLOWANCE DISAMBIGUATE DISANALOGIES DISANALOGOUS DISANIMATING DISAPPEARING DISAPPROVALS DISARMAMENTS DISARRANGING DISASSOCIATE DISAVAUNCING DISCALCEATES DISCLAMATION DISEMBARRASS DISGRADATION DISPLACEABLE DISPLEASANCE DISPLEASANTS DISTRACTABLE DISTRAINABLE DIVARICATELY DIVARICATING DIVARICATION DIVARICATORS DIVINATORIAL DOCTRINARIAN DODECAGYNIAN DOGMATICALLY DONATISTICAL DRACONIANISM DRACONICALLY DRACONTIASES DRACONTIASIS DRAGONNADING DRAMATICALLY DRAMATICISMS DRAMATISABLE DRAMATIZABLE DRAMATURGIES DRAMATURGIST DRAPEABILITY DUNIEWASSALS DUNNIEWASSAL DYNASTICALLY DYSAESTHESIA DYSCALCULIAS DYSPAREUNIAS EMPARADISING ENARTHRODIAL ENCARNALISED ENCARNALIZED ENDOPARASITE ENGARLANDING EQUIBALANCED ERADICATIONS EUTHANATISED EUTHANATIZED EXTRADITABLE FAINTHEARTED FAMILIARISED FAMILIARIZED FARADISATION FARADIZATION FARTHINGLAND FASCICULATED FASCINATEDLY FOUNDATIONAL FOUNTAINHEAD FRACTIONATED GALACTOSIDES GALLIARDISES GALRAVITCHED GANGLIONATED GEODYNAMICAL GLADIATORIAL GLADIATORIAN GLADWRAPPING GRADUALISTIC GRADUALITIES GRADUATESHIP GRANDDADDIES GRANDIFLORAS GRANDPAPPIES GUARDIANSHIP HAEMODYNAMIC HAIRBREADTHS HAIRSBREADTH HALLUCINATED HANDBAGGINGS HANDCRAFTING HANDFASTINGS HANDICAPPERS HANDICAPPING HANDICRAFTER HANDSHAKINGS HANDSTAMPING HANSARDISING HANSARDIZING HARDINGGRASS HARDSTANDING HARLEQUINADE HARUSPICATED HEADBANGINGS HEADREACHING HERALDICALLY HEREDITARIAN HEXADACTYLIC HEXADECANOIC HEXADECIMALS HEXAGRAMMOID HOLIDAYMAKER HOLLANDAISES HYDRALAZINES HYDRARGYRIAS HYPNOPAEDIAS HYRACOIDEANS IDEALISATION IDEALIZATION IDEATIONALLY IMPARADISING INADAPTATION INADEQUACIES INADEQUATELY INCAPSULATED INCARCERATED INCARDINATED INCARDINATES INCARNADINED INCARNADINES INDICATIONAL INELABORATED INERADICABLE INERADICABLY INFANTICIDAL INFATUATEDLY INSTAGRAMMED INSTANTIATED INTERCALATED INTERSTADIAL INTRACARDIAC INTRACARDIAL INTRAMUNDANE INVALIDATING INVALIDATION INVALIDATORS IRRADIANCIES IRRADIATIONS IRRADICATING JUDICATORIAL LABIODENTALS LABRADORITES LAGGARDLIEST LANDBOARDING LANDGRAVIATE LANDGRAVINES LANDSCAPINGS LANDSCAPISTS LIQUIDAMBARS LOADSAMONIES LOGODAEDALIC LONGICAUDATE MACADAMISERS MACADAMISING MACADAMIZERS MACADAMIZING MACHAIRODONT MACHICOLATED MADEFACTIONS MADERISATION MADERIZATION MADREPORIANS MADRIGALISTS MAENADICALLY MAIDSERVANTS MAINSTREAMED MAINTENANCED MALADJUSTIVE MANDARINATES MANDARINISMS MANDIBULATED MANDIBULATES MANDUCATIONS MANSPREADING MAQUILADORAS MARGINALISED MARGINALIZED MARISCHALLED MARIVAUDAGES MASQUERADING MATERIALISED MATERIALIZED MATHEMATISED MATHEMATIZED MATRICULATED MEDIAEVALISM MEDIAEVALIST MEDICAMENTAL MEGALOCARDIA MELODRAMATIC METASTASISED METASTASIZED METHANAMIDES MICROMANAGED MILLIRADIANS MISALLOCATED MISCATALOGED MISDEMEANANT MISEVALUATED MONOCARDIANS MONODRAMATIC MULTIGRAVIDA MULTIWARHEAD MURDERABILIA NAPHTHALISED NAPHTHALIZED NATIONALISED NATIONALIZED NEOPAGANISED NEOPAGANIZED NIACINAMIDES NOMADISATION NOMADIZATION NONACADEMICS NONACTIVATED NONADIABATIC NONCANDIDACY NONCANDIDATE NONRAILROADS NORADRENALIN ORCHIDOMANIA ORTHOVANADIC OUTBARGAINED OVERDRAMATIC PACHYDERMIAS PADDYWACKING PAEDERASTIES PAEDIATRISTS PAEDOBAPTISM PAEDOBAPTIST PAEDOLOGICAL PAEDOPHILIAC PAEDOPHILIAS PANDAEMONIUM PANDEMONIANS PARABOLOIDAL PARADIDDLING PARADIGMATIC PARADISAICAL PARADISIACAL PARADOXIDIAN PARADOXURINE PARADROPPING PARAGLIDINGS PARALLELISED PARALLELIZED PARAMASTOIDS PARAMEDICALS PARAMETRISED PARAMETRIZED PARAPERIODIC PARASCENDING PARASITICIDE PARASPHENOID PARASUICIDES PARATHYROIDS PARATYPHOIDS PARFOCALISED PARFOCALIZED PARLOURMAIDS PARTICIPATED PASQUINADERS PASQUINADING PEDANTICALLY PEDIATRICIAN PEDICELLARIA PLANTIGRADES PLATITUDINAL POSTPRANDIAL PREVARICATED PRIMIGRAVIDA PRISMATOIDAL PROGRADATION PROPAGANDISE PROPAGANDISM PROPAGANDIST PROPAGANDIZE PTERIDOMANIA QUADRAPHONIC QUADRAPLEGIA QUADRAPLEGIC QUADRASONICS QUADRATRICES QUADRATRIXES QUADRENNIALS QUADRIENNIAL QUADRINOMIAL QUADRIPLEGIA QUADRIVALENT RADICALISING RADICALISTIC RADICALITIES RADICALIZING RADIESTHESIA RADIOCARBONS RADIOGRAPHED RADIOGRAPHER RADIOGRAPHIC RADIOLABELED RADIOLARIANS RADIOLOGICAL RADIOPAGINGS RADIOTHERAPY RADIOTRACERS RAILROADINGS RATIOCINATED RATIONALISED RATIONALIZED REACCLIMATED REACQUAINTED READAPTATION READMITTANCE RECALIBRATED REINCARNATED REMAINDERMAN RERADIATIONS RETARDANCIES RETARDATIONS REVACCINATED REVALIDATING REVALIDATION RIJKSDAALERS SACCADICALLY SACCHARIFIED SACCHAROIDAL SADISTICALLY SAFEGUARDING SAILBOARDERS SAILBOARDING SALAMANDRIAN SALAMANDRINE SALAMANDROID SALICYLAMIDE SALMAGUNDIES SANCTUARISED SANCTUARIZED SANDBLASTING SANDPAINTING SANDPAPERIER SANDPAPERING SAPINDACEOUS SARDONICALLY SAUROPSIDANS SCANDALISERS SCANDALISING SCANDALIZERS SCANDALIZING SCARABAEOIDS SEMIPALMATED SPEARHEADING SPORADICALLY STANDARDISED STANDARDISER STANDARDISES STANDARDIZED STANDARDIZER STANDARDIZES STANDPATTISM STARBOARDING STENOCARDIAS STRAPPADOING SUBABDOMINAL SUBARACHNOID SUBCARDINALS SUBDIACONATE SUBSIDIARIAT SULFADIAZINE SYLLABICATED TACHYCARDIAC TACHYCARDIAS TARRADIDDLES TRADEMARKING TRADESCANTIA TRADITIONARY TRADUCIANISM TRADUCIANIST TRANSUDATION TRIANGULATED TRIRADIATELY TRYPANOCIDAL TRYPARSAMIDE TYRANNICIDAL ULTRADISTANT ULTRARADICAL UNACCLIMATED UNACQUAINTED UNAFFILIATED UNALLEVIATED UNASSOCIATED UNBARRICADED UNBARRICADES UNCALIBRATED UNCAPTIVATED UNDRAMATISED UNDRAMATIZED UNHABITUATED UNIRRADIATED UNMAINTAINED UNPARADISING UNVACCINATED UNVARIEGATED UPGRADATIONS VACATIONLAND VAGABONDISED VAGABONDISES VAGABONDISMS VAGABONDIZED VAGABONDIZES VALETUDINARY VANGUARDISMS VANGUARDISTS VASCULARISED VASCULARIZED VASODILATION VASODILATORS VASODILATORY VAUDEVILLEAN VAUDEVILLIAN VOCABULARIED WAKEBOARDING WALDGRAVINES WALLYDRAIGLE WITHDRAWABLE ZANTEDESCHIA