There are 759 twelve-letter words containing A, D, I and U, https://www.bestwordlist.com/c/a/4/12letterwordswithadiu.htm ACIDOPHILOUS ACIDULATIONS ACQUITTANCED ADENOVIRUSES ADJUDICATING ADJUDICATION ADJUDICATIVE ADJUDICATORS ADJUDICATORY ADJUNCTIVELY ADMINICULATE ADSCITITIOUS ADULTERATING ADULTERATION ADULTERISING ADULTERIZING ADUMBRATIONS ADVENTITIOUS ADVENTURINGS ADVENTURISMS ADVENTURISTS AGGLUTINATED AGRIPRODUCTS AGROINDUSTRY AGUARDIENTES ALTITUDINOUS AMBIDEXTROUS AMMUNITIONED ANDOUILLETTE ANDROCLINIUM ANEUPLOIDIES ANTEDILUVIAL ANTEDILUVIAN ANTEPENDIUMS ANTIDANDRUFF ANTIDILUTION ANTIDIURETIC ANTIDUMPINGS APODYTERIUMS APPENDICULAR APPLAUDINGLY APPROPINQUED ASTOUNDINGLY ATTITUDINISE ATTITUDINIZE AUCTIONEERED AUDIBILITIES AUDIBILIZING AUDIOLOGICAL AUDIOLOGISTS AUDIOMETRIES AUDIOMETRIST AUDIOTYPINGS AUDIOTYPISTS AUDIOVISUALS AUDITABILITY AUDITORSHIPS AUTOANTIBODY AUTODIALLING AUTODIDACTIC AUTOXIDATION BARRAMUNDIES BICUSPIDATES BIOHAZARDOUS BIQUADRATICS BOATBUILDERS BOATBUILDING BODYGUARDING BOULEVARDIER CALYCOIDEOUS CANDIDATURES CATALOGUISED CATALOGUIZED CAUDILLISMOS CIRCULARISED CIRCULARIZED CLADOSPORIUM CLAIRAUDIENT CLAUDICATION COACHBUILDER COADJUTRICES COADJUTRIXES COADUNATIONS COCULTIVATED COEDUCATIONS COLOQUINTIDA COMMUNALISED COMMUNALIZED COMMUNICATED CONDUCTIONAL CONDUCTORIAL CONDUPLICATE CONFIGURATED CONQUISTADOR COUNTERRAIDS CULVERTAILED CURVICAUDATE CUSPIDATIONS DAMASQUINING DANDRUFFIEST DARMSTADTIUM DAUGHTERLIER DAUGHTERLING DAUNORUBICIN DAUPHINESSES DEARTICULATE DEATTRIBUTED DEATTRIBUTES DEBAUCHERIES DECARBURISED DECARBURISES DECARBURIZED DECARBURIZES DECASUALISED DECASUALISES DECASUALIZED DECASUALIZES DECLINATURES DECRUSTATION DECUMULATION DECURIONATES DECURVATIONS DECUSSATIONS DEDUPLICATED DEDUPLICATES DEFEUDALISED DEFEUDALISES DEFEUDALIZED DEFEUDALIZES DEFRAUDATION DEGLUTINATED DEGLUTINATES DEGUSTATIONS DEHUMANISING DEHUMANIZING DEMAGOGUISMS DEMODULATING DEMODULATION DEMUTUALISED DEMUTUALISES DEMUTUALIZED DEMUTUALIZES DENATURALISE DENATURALIZE DENATURATION DENATURISING DENATURIZING DENTICULATED DENTILINGUAL DENUCLEARISE DENUCLEARIZE DENUNCIATING DENUNCIATION DENUNCIATIVE DENUNCIATORS DENUNCIATORY DEPAUPERISED DEPAUPERISES DEPAUPERIZED DEPAUPERIZES DEPLUMATIONS DEPOPULATING DEPOPULATION DEPUTISATION DEPUTIZATION DEREGULATING DEREGULATION DESATURATING DESATURATION DESEXUALISED DESEXUALISES DESEXUALIZED DESEXUALIZES DESPUMATIONS DESQUAMATING DESQUAMATION DESQUAMATIVE DETRUNCATING DETRUNCATION DEUTERANOPIA DEUTERANOPIC DEUTERATIONS DEUTOPLASMIC DEUTOPLASTIC DEVALUATIONS DIAPHANOUSLY DIASCORDIUMS DIATOMACEOUS DIBENZOFURAN DIFUNCTIONAL DIJUDICATING DIJUDICATION DILUCIDATING DILUCIDATION DILUVIALISMS DILUVIALISTS DISACCUSTOMS DISADVENTURE DISAMBIGUATE DISANALOGOUS DISANNULLERS DISANNULLING DISANNULMENT DISASTROUSLY DISAUTHORISE DISAUTHORIZE DISAVAUNCING DISAVENTROUS DISAVENTURES DISAVOUCHING DISCOMEDUSAN DISCOUNTABLE DISCOURAGERS DISCOURAGING DISCULPATING DISCUSSIONAL DISDAINFULLY DISFAVOURERS DISFAVOURING DISFEATURING DISMOUNTABLE DISMUTATIONS DISPAUPERING DISPAUPERISE DISPAUPERIZE DISPLEASURED DISPLEASURES DISPUTATIONS DISPUTATIOUS DISQUALIFIED DISQUALIFIER DISQUALIFIES DISREGARDFUL DISREPUTABLE DISREPUTABLY DISSIMULATED DISSIMULATES DISSIMULATOR DISSUASIVELY DISSUASORIES DISTRAUGHTLY DISTRIBUTARY DISTURBANCES DISTURBATIVE DIURETICALLY DIVERTICULAR DIVULGATIONS DOLPHINARIUM DOULOCRACIES DRAGONFRUITS DRAMATURGIES DRAMATURGIST DRAUGHTINESS DRUMBEATINGS DUBITATIVELY DUNIEWASSALS DUNNIEWASSAL DUODECENNIAL DUODECIMALLY DUPABILITIES DUPLICATIONS DUPLICATURES DURABILITIES DURALUMINIUM DYSCALCULIAS DYSPAREUNIAS EDACIOUSNESS EDUCATIONESE EDUCATIONIST EDULCORATING EDULCORATION EDULCORATIVE EDUTAINMENTS EISTEDDFODAU ELUCIDATIONS ENDEAVOURING ENDURABILITY EQUIBALANCED EQUIDISTANCE EQUILIBRATED EUDAEMONISMS EUDAEMONISTS EUDAIMONISMS EUDAIMONISTS EUTHANATISED EUTHANATIZED EVENTUALISED EVENTUALIZED FASCICULATED FASTIDIOUSLY FAULTFINDERS FAULTFINDING FECUNDATIONS FINGERGUARDS FLUIDEXTRACT FLUIDISATION FLUIDIZATION FLUORIDATING FLUORIDATION FOLLICULATED FORMULARISED FORMULARIZED FOUNDATIONAL FOUNDATIONER FOUNTAINHEAD FUNCTIONATED FUNDRAISINGS FUNGICIDALLY FURAZOLIDONE GESTICULATED GLANDIFEROUS GLUCOSIDASES GOURMANDISED GOURMANDISES GOURMANDISMS GOURMANDIZED GOURMANDIZES GRADUALISTIC GRADUALITIES GRADUATESHIP GROUNDBAITED GUANETHIDINE GUARDIANSHIP GUESSTIMATED GUTTURALISED GUTTURALIZED HALLUCINATED HARBOURSIDES HARLEQUINADE HARUSPICATED HEADHUNTINGS HEXAFLUORIDE HINDQUARTERS HUSBANDLIEST HYDRAULICKED HYPERDULICAL IDOLATROUSLY ILLUSTRATEDS IMPOSTUMATED INADEQUACIES INADEQUATELY INAUDIBILITY INCAPSULATED INCOMUNICADO INDISPUTABLE INDISPUTABLY INDIVIDUALLY INDIVIDUATED INDIVIDUATES INDIVIDUATOR INDUPLICATED INDUSTRIALLY INEQUIVALVED INEXACTITUDE INFATUATEDLY INFEUDATIONS INFUNDIBULAR INGRATITUDES INGURGITATED INJUDICIALLY INTERMUNDANE INTRAMUNDANE INTURBIDATED INTURBIDATES IRACUNDITIES IRACUNDULOUS JUDICATORIAL JUDICATORIES LAPIDICOLOUS LATIFUNDIUMS LATITUDINOUS LEUCITOHEDRA LEUCODERMIAS LEUCOPLASTID LIFEGUARDING LIQUIDAMBARS LIQUIDATIONS LONGICAUDATE LONGITUDINAL MALADJUSTIVE MALNOURISHED MANDIBULATED MANDIBULATES MANDUCATIONS MAQUILADORAS MARIVAUDAGES MASCULINISED MASCULINIZED MASQUERADING MATRICULATED MENDACIOUSLY MIDLATITUDES MINIATURISED MINIATURIZED MISADJUSTING MISADVENTURE MISDEMEANOUR MISEDUCATING MISEDUCATION MISEVALUATED MISGUIDANCES MISPERSUADED MISPERSUADES MODULABILITY MODULARITIES MOLLUSCOIDAL MORDACIOUSLY MOULDABILITY MOUNTAINSIDE MOUSTACHIOED MULTIDENTATE MULTIFACETED MULTIGRAVIDA MULTILAYERED MULTIPLICAND MULTITRACKED MULTIWARHEAD MURDERABILIA MYCODOMATIUM NONCUSTODIAL NONEDUCATION NUCLEOCAPSID NUCLEOTIDASE NULLIFIDIANS NURSEMAIDING NURSERYMAIDS OPHIDIARIUMS ORCHIDACEOUS OUTBARGAINED OUTDISTANCED OUTDISTANCES OUTLANDISHLY OUTORGANISED OUTORGANIZED OUTPASSIONED OUTSPREADING OUTVILLAINED OVERFATIGUED PALUDICOLOUS PANDAEMONIUM PANDEMONIUMS PARADOXURINE PARASUICIDES PARLOURMAIDS PASQUINADERS PASQUINADING PECULIARISED PECULIARIZED PEDAGOGUISMS PEDICULATION PENINSULATED PERDURATIONS PERICARDIUMS PHILADELPHUS PLATITUDINAL PLEURODYNIAS POSTDILUVIAL POSTDILUVIAN PRASEODYMIUM PREADJUSTING PREAUDIENCES PRECAUTIONED PREFIGURATED PREJUDICATED PREJUDICATES PREQUALIFIED PRODUCTIONAL PROMUSCIDATE PROPAEDEUTIC PRUDENTIALLY PRUSSIANISED PRUSSIANIZED PSEUDIMAGOES PSEUDOLOGIAS PSEUDOPODIAL PUMPHANDLING PUNDITOCRACY QUADRAPHONIC QUADRAPLEGIA QUADRAPLEGIC QUADRASONICS QUADRATRICES QUADRATRIXES QUADRENNIALS QUADRENNIUMS QUADRICEPSES QUADRIENNIAL QUADRIENNIUM QUADRILLIONS QUADRINOMIAL QUADRIPHONIC QUADRIPLEGIA QUADRIPLEGIC QUADRISECTED QUADRIVALENT QUADROPHONIC QUIDDITATIVE QUINDECAGONS QUINDECAPLET QUINQUENNIAD RADICICOLOUS RADICIVOROUS RADIOLUCENCY RADIONUCLIDE RADIOSURGERY RADIOTHORIUM REACQUAINTED REATTRIBUTED REAUTHORISED REAUTHORIZED RECIRCULATED RECULTIVATED REDUNDANCIES REDUPLICATED REDUPLICATES REEDUCATIONS REFOUNDATION REGURGITATED REINOCULATED RELAUNDERING RELUBRICATED REPUDIATIONS RESTIMULATED RESUSCITATED REVICTUALLED REVISUALIZED ROADBUILDING RUDIMENTALLY SAFEGUARDING SALMAGUNDIES SANCTUARISED SANCTUARIZED SAPINDACEOUS SAUROPSIDANS SCINDAPSUSES SCRATCHBUILD SESQUIPEDALS SINGULARISED SINGULARIZED SINUSOIDALLY SLUGGARDISED SLUGGARDISES SLUGGARDIZED SLUGGARDIZES SLUGGARDLIER SOAPSUDSIEST SQUALIDITIES SQUANDERINGS STRIDULANCES STRIDULANTLY STRIDULATING STRIDULATION STRIDULATORS STRIDULATORY STUDDINGSAIL SUBABDOMINAL SUBACIDITIES SUBARACHNOID SUBAUDITIONS SUBCARDINALS SUBDEANERIES SUBDIACONATE SUBDIVIDABLE SUBDOMINANTS SUBDUPLICATE SUBEDITORIAL SUBEPIDERMAL SUBFEUDATION SUBINDICATED SUBINDICATES SUBINFEUDATE SUBIRRIGATED SUBMANIFOLDS SUBORDINANCY SUBORDINATED SUBORDINATES SUBORDINATOR SUBSIDIARIAT SUBSIDIARIES SUBSIDIARILY SUBSIDIARITY SUBSIDISABLE SUBSIDIZABLE SUBURBANISED SUBURBANIZED SUBVOCALISED SUBVOCALIZED SUDORIPAROUS SUFFUMIGATED SULFADIAZINE SULFADOXINES SULFONAMIDES SULPHADOXINE SULPHONAMIDE SUPERORDINAL SUPERPRAISED SURADDITIONS SURFBOARDING TAUTOLOGISED TAUTOLOGIZED TESTICULATED TOLBUTAMIDES TRADUCIANISM TRADUCIANIST TRANQUILISED TRANQUILIZED TRANSDUCTION TRANSFIGURED TRANSUDATION TREPIDACIOUS TREPIDATIOUS TRIADELPHOUS TRIANGULATED TRICUSPIDATE TRIDACTYLOUS TRIPUDIATING TRIPUDIATION TURACOVERDIN TURRICULATED ULTRADISTANT ULTRARADICAL ULTRAREFINED UNACCLIMATED UNACCREDITED UNACQUAINTED UNADMONISHED UNADVERTISED UNADVERTIZED UNAFFILIATED UNALLEVIATED UNASCENDIBLE UNASSISTEDLY UNASSOCIATED UNATTRIBUTED UNAUTHORISED UNAUTHORIZED UNBARRICADED UNBARRICADES UNBIASEDNESS UNBRIDGEABLE UNCALIBRATED UNCANDIDNESS UNCAPTIVATED UNCIRCULATED UNCLASSIFIED UNCREDITABLE UNCULTIVATED UNDECEIVABLE UNDEFOLIATED UNDELIBERATE UNDEMOCRATIC UNDERACHIEVE UNDERACTIONS UNDERBEARING UNDERCOATING UNDERDRAINED UNDERDRAWING UNDERHANDING UNDERHEATING UNDERLAPPING UNDERLEASING UNDERLOADING UNDERMANNING UNDERMEANING UNDERPASSION UNDERPLAYING UNDERPRAISED UNDERPRAISES UNDERSEALING UNDERSTATING UNDERTAKINGS UNDERVALUING UNDESIGNATED UNDESIRABLES UNDESPAIRING UNDIPLOMATIC UNDISCHARGED UNDISCORDANT UNDISMANTLED UNDISPATCHED UNDISPUTABLE UNDISPUTABLY UNDISTRACTED UNDRAMATISED UNDRAMATIZED UNDRINKABLES UNDULATINGLY UNDUPLICATED UNEMPHASISED UNEMPHASIZED UNFADINGNESS UNFASTIDIOUS UNFEUDALISED UNFEUDALISES UNFEUDALIZED UNFEUDALIZES UNFORMALISED UNFORMALIZED UNFORMIDABLE UNFRANCHISED UNGERMINATED UNGLAMORISED UNGLAMORIZED UNGUICULATED UNHABITUATED UNIDEALISTIC UNINHABITEDS UNINOCULATED UNINTEGRATED UNIRRADIATED UNLIQUIDATED UNMAINTAINED UNMECHANISED UNMECHANIZED UNMETHODICAL UNMODIFIABLE UNMYELINATED UNNILQUADIUM UNORIGINATED UNPARADISING UNPATRONISED UNPATRONIZED UNPAVILIONED UNPROCLAIMED UNQUANTIFIED UNRESTRAINED UNRIDDLEABLE UNSANCTIFIED UNSANCTIONED UNSEMINARIED UNSOCIALISED UNSOCIALIZED UNSTEADINESS UNSTIMULATED UNSTRATIFIED UNSUBLIMATED UNTERMINATED UNVACCINATED UNVANQUISHED UNVARIEGATED UNVENTILATED UNVERBALISED UNVERBALIZED UNVULGARISED UNVULGARIZED UPBRAIDINGLY UPGRADATIONS VALETUDINARY VANGUARDISMS VANGUARDISTS VARICOLOURED VASCULARISED VASCULARIZED VASCULITIDES VAUDEVILLEAN VAUDEVILLIAN VAUDEVILLIST VERMICULATED VOCABULARIED