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