There are 589 fifteen-letter words containing A, D, R and S, https://www.bestwordlist.com/c/a/4/15letterwordswithadrs.htm ACHONDROPLASIAS ACHONDROPLASTIC ADENOCARCINOMAS ADIATHERMANCIES ADMINISTRATIONS ADMIRABLENESSES ADRENALECTOMIES ADSORBABILITIES ADVENTUROUSNESS ADVERSARINESSES AERODYNAMICISTS AEROHYDROPLANES AFFORDABILITIES AGGRANDISEMENTS AGGRANDIZEMENTS ALLOTETRAPLOIDS ALTITUDINARIANS AMARYLLIDACEOUS AMBASSADORSHIPS AMBIDEXTERITIES ANDROGYNOPHORES ANDROMEDOTOXINS ANDROMONOECIOUS ANDROMONOECISMS ANDROSTENEDIONE ANTAPHRODISIACS ANTIAPHRODISIAC ANTIDEPRESSANTS ANTIDERIVATIVES ANTIDIARRHOEALS ANTIFEDERALISTS ANTIRADICALISMS APPRENTICEHOODS ARACHNOIDITISES ARCHIDIACONATES ARCHPRIESTHOODS ARRONDISSEMENTS ASTRODYNAMICIST ATTITUDINARIANS AUDIOMETRICIANS AUTODESTRUCTING AUTODESTRUCTIVE AUTORADIOGRAPHS AUTOTETRAPLOIDS BAREFACEDNESSES BASTARDISATIONS BASTARDIZATIONS BEARDLESSNESSES BIODEGRADATIONS BIOREMEDIATIONS BLACKGUARDLIEST BOWDLERISATIONS BOWDLERIZATIONS BRACHYDACTYLIES BRACHYDACTYLISM BRACHYDACTYLOUS BRACHYDIAGONALS BRACHYPINAKOIDS BRONCHODILATORS CALENDARISATION CATHODOGRAPHERS CATHODOGRAPHIES CENTRIFUGALISED CHLOROTHIAZIDES CHLORPROPAMIDES CHLORTHALIDONES CHONDRICHTHYANS CHONDROCRANIUMS CHORDAMESODERMS CLEARHEADEDNESS COADMINISTERING COLDHEARTEDNESS COMRADELINESSES CONSECRATEDNESS CONSIDERATENESS CONSIDERATIVELY CONTAINERBOARDS CONTRADICTORIES CONTRAINDICANTS CONTRAINDICATES COTRANSDUCTIONS COUNTERSHADINGS CREDENTIALLINGS CREDITABILITIES CROTONALDEHYDES CYBERCHONDRIACS CYLINDRICALNESS CYPROHEPTADINES DACTYLOGRAPHERS DACTYLOGRAPHIES DAGUERREOTYPERS DAGUERREOTYPIES DAGUERREOTYPIST DANGEROUSNESSES DASTARDLINESSES DECARBONISATION DECARBURISATION DECHLORINATIONS DECHRISTIANISED DECHRISTIANISES DECHRISTIANIZED DECHRISTIANIZES DECOLORISATIONS DECOLORIZATIONS DECOLOURISATION DECONSECRATIONS DECONTAMINATORS DECRIMINALISING DEFENESTRATIONS DEFIBRILLATIONS DEFORMABILITIES DEGENERATIONIST DEGLAMORISATION DEGRADABILITIES DEGRADINGNESSES DEINDUSTRIALISE DEINDUSTRIALIZE DEMATERIALISING DEMISEMIQUAVERS DEMOCRATISATION DEMONSTRABILITY DEMONSTRATIONAL DEMONSTRATIVELY DEMORALISATIONS DEMORALIZATIONS DENITRIFICATORS DEPARTMENTALISE DEPARTMENTALISM DEPERSONALISING DEPERSONALIZING DEPHOSPHORYLATE DEPLORABILITIES DEPOLARISATIONS DEPOLARIZATIONS DEREGISTRATIONS DERIVATISATIONS DERIVATIZATIONS DERMATOGLYPHICS DERMATOGRAPHIAS DERMATOGRAPHIES DERMATOMYOSITIS DERMATOPHYTOSES DERMATOPHYTOSIS DERMATOPLASTIES DESACRALISATION DESACRALIZATION DESERTIFICATION DESILVERISATION DESILVERIZATION DESIRABLENESSES DESPERATENESSES DESPIRITUALISED DESPIRITUALISES DESPIRITUALIZED DESPIRITUALIZES DESULFURISATION DESULFURIZATION DESULPHURATIONS DETERMINATENESS DETERRABILITIES DETRIBALISATION DEUTERANOMALIES DEUTERANOMALOUS DEVALORISATIONS DEVALORIZATIONS DEXTROROTATIONS DIAHELIOTROPISM DIAPHOTOTROPIES DIAPHOTOTROPISM DIAPHRAGMATITIS DIAPHRAGMITISES DIASTEREOISOMER DIASTROPHICALLY DICHLOROETHANES DICHROMATICISMS DICTATORIALNESS DIFFERENTIATORS DIFFRACTIVENESS DIFFRACTOMETERS DIMENHYDRINATES DISACCHARIDASES DISAFFIRMATIONS DISAFFORESTMENT DISAGGREGATIONS DISAGREEABILITY DISAPPROBATIONS DISAPPROPRIATED DISAPPROPRIATES DISARRANGEMENTS DISARTICULATING DISARTICULATION DISARTICULATORS DISATTRIBUTIONS DISCIPLINARIANS DISCIPLINARIUMS DISCOLOURATIONS DISCOMBOBERATED DISCOMBOBERATES DISCONFIRMATION DISCOURAGEMENTS DISCRETIONARILY DISCRIMINATIONS DISEMBARKATIONS DISEMBARRASSING DISENCUMBRANCES DISENFRANCHISED DISENFRANCHISES DISENTHRALLMENT DISENTHRALMENTS DISENTRAINMENTS DISENTRANCEMENT DISEQUILIBRATED DISEQUILIBRATES DISFEATUREMENTS DISFORESTATIONS DISGRACEFULNESS DISHARMONIOUSLY DISHEARTENINGLY DISHEARTENMENTS DISINCARCERATED DISINCARCERATES DISINCORPORATED DISINCORPORATES DISINFLATIONARY DISINFORMATIONS DISINHERITANCES DISINTEGRATIONS DISINTERMEDIATE DISINTHRALLINGS DISINVIGORATING DISNATURALISING DISNATURALIZING DISORGANISATION DISORGANIZATION DISORIENTATIONS DISPARATENESSES DISPROPORTIONAL DISQUISITIONARY DISREPUTABILITY DISSATISFACTORY DISSERTATIONIST DISSIMILARITIES DISTEMPERATURES DISTRACTIBILITY DIVERSIFICATION DOCTRINARIANISM DOCUMENTARISING DOLICHOSAURUSES DORSIBRANCHIATE DORSIVENTRALITY DORSOVENTRALITY DOWNHEARTEDNESS DOWNREGULATIONS DRAUGHTSMANSHIP DRAUGHTSPERSONS DREADLESSNESSES DREAMLESSNESSES DRINKABLENESSES DYSMORPHOPHOBIA ECHINODERMATOUS ECHOCARDIOGRAMS EDRIOPHTHALMOUS ELECTRODIALYSES ELECTRODIALYSIS ELECTRODYNAMICS ENCHONDROMATOUS ENDEARINGNESSES ENDOPARASITISMS ENDORADIOSONDES ENDURABLENESSES ENGRAINEDNESSES EQUIPONDERANCES ESTRANGEDNESSES EXAGGERATEDNESS EXTRAORDINARIES EXTRUDABILITIES FEATHERBEDDINGS FEATHERSTITCHED FEDERALISATIONS FEDERALIZATIONS FIDEICOMMISSARY FLAVOURDYNAMICS FOOLHARDINESSES FOREORDAINMENTS FOREORDINATIONS FORISFAMILIATED FORMIDABILITIES FURFURALDEHYDES GEODEMOGRAPHICS GERRYMANDERINGS GINGERBREADIEST GLUTARALDEHYDES GLYCERALDEHYDES GRANDILOQUENCES GRANDIOSENESSES GROUNDBREAKINGS HALFHEARTEDNESS HAPHAZARDNESSES HARDHEARTEDNESS HARPSICHORDISTS HAZARDOUSNESSES HEADMASTERLIEST HEADMASTERSHIPS HEADMISTRESSIER HEREDITARIANISM HEREDITARIANIST HERMAPHRODITISM HETERODACTYLOUS HETEROSCEDASTIC HYDROCEPHALUSES HYDROCORALLINES HYDRODYNAMICIST HYDROEXTRACTORS HYDROGENISATION HYDROSTATICALLY HYDROTHERAPISTS HYDROXYAPATITES HYPERADRENALISM HYPERFASTIDIOUS HYPERLIPIDEMIAS HYPERSTIMULATED HYPOCHONDRIASES HYPOCHONDRIASIS HYPOCHONDRIASMS HYPOCHONDRIASTS ICOSITETRAHEDRA IDIOSYNCRATICAL INCONSIDERATELY INCONSIDERATION INCOORDINATIONS INDETERMINACIES INDISCRETIONARY INDISTRIBUTABLE INDIVIDUALISERS INDIVIDUALIZERS INDOCTRINATIONS INDUSTRIALISING INDUSTRIALIZING INGRAINEDNESSES INSUBORDINATELY INSUBORDINATION INTERDIVISIONAL INTERGRADATIONS INTERMEDIATIONS INTERSTRATIFIED JURISPRUDENTIAL KINDERGARTENERS KINDHEARTEDNESS LABYRINTHODONTS LARYNGECTOMISED LATITUDINARIANS LEGERDEMAINISTS LIONHEARTEDNESS MALADMINISTERED MALADROITNESSES MALDISTRIBUTION MELODRAMATISING MERIDIONALITIES METOCLOPRAMIDES MISAPPREHENDING MISAPPROPRIATED MODERNISTICALLY MONOSACCHARIDES MONOUNSATURATED MULTITHREADINGS MYOCARDIOGRAPHS NEARSIGHTEDNESS NEBUCHADNEZZARS NIGGARDLINESSES NONDOCTRINAIRES NONDURABILITIES NONRANDOMNESSES NORTHEASTWARDLY NORTHWESTWARDLY NUDIBRANCHIATES OLIGOSACCHARIDE OPENHEARTEDNESS OUTDOORSMANSHIP OVERADJUSTMENTS OVERADVERTISING OVERCAPITALISED OVERCENTRALISED OVERCOMPENSATED OVERDECORATIONS OVERDRAMATISING OVERFORWARDNESS OVERGENERALISED OVERMEDICATIONS OVERSPECIALISED OVERSPECIALIZED OXIDOREDUCTASES PARADOXICALNESS PARALLELEPIPEDS PARALLELOPIPEDS PEDESTRIANISING PEDESTRIANIZING PERDURABILITIES PERISSODACTYLES PERISSODACTYLIC PHILANTHROPOIDS PLATITUDINISERS PLATITUDINIZERS POLYACRYLAMIDES POLYARTHRITIDES POLYSACCHARIDES POLYUNSATURATED PONDERABILITIES POSTGRADUATIONS POSTIRRADIATION POSTSECONDARIES PREADOLESCENCES PREDATORINESSES PREDESIGNATIONS PREDESTINARIANS PREDESTINATIONS PREDICABILITIES PREDICTABLENESS PREJUDICIALNESS PREPONDERANCIES PREPONDERATIONS PREPRESIDENTIAL PRESTIDIGITATOR PRIMORDIALITIES PROLETARIANISED PRUDENTIALITIES PSEUDEPIGRAPHIC PSEUDEPIGRAPHON PSEUDOARTHROSES PSEUDOARTHROSIS PSEUDOMEMBRANES PSEUDOPREGNANCY PYRAMIDOLOGISTS QUADRAGENARIANS QUADRINGENARIES QUADRISYLLABICS QUADRISYLLABLES QUADRIVALENCIES QUADRUPLICITIES QUODLIBETARIANS RADICALISATIONS RADICALIZATIONS RADICULOPATHIES RADIOACTIVITIES RADIOAUTOGRAPHS RADIOBIOLOGISTS RADIOPHOSPHORUS RADIOSCOPICALLY RADIOSENSITISED RADIOSENSITISES RADIOSENSITIZED RADIOSENSITIZES RADIOSTRONTIUMS RADIOTELEGRAPHS RADIOTELEMETERS RADIOTELEPHONES RADIOTHERAPISTS READMINISTERING READVERTISEMENT RECODIFICATIONS RECOMMENDATIONS RECONDENSATIONS RECONSIDERATION RECONSOLIDATING RECONSOLIDATION REDEEMABILITIES REDINTEGRATIONS REDISTILLATIONS REDOUBTABLENESS REFUNDABILITIES REGARDFULNESSES REINDUSTRIALISE REINDUSTRIALIZE REMEDIABILITIES REPUDIATIONISTS RESPECTABILISED RESPECTABILIZED RESPIRITUALISED RESPIRITUALIZED RETROGRADATIONS RIGIDIFICATIONS ROLLERCOASTERED ROUNDHEADEDNESS RUDIMENTARINESS SACERDOTALISING SACERDOTALIZING SCLERODERMATOUS SCRATCHBUILDERS SCRATCHBUILDING SCRIMSHANDERING SECONDARINESSES SEDENTARINESSES SEMICYLINDRICAL SEMIDOCUMENTARY SHERARDISATIONS SHERARDIZATIONS SINISTRODEXTRAL SLEDGEHAMMERING SOFTHEARTEDNESS SOLDERABILITIES SOLITUDINARIANS SOUTHWESTWARDLY SPHAEROSIDERITE SPHEROIDISATION SPHEROIDIZATION SPREADABILITIES STADHOLDERSHIPS STADTHOLDERATES STADTHOLDERSHIP STANDARDISATION STANDARDIZATION STRAIGHTFORWARD STRAITLACEDNESS SUBMINIATURISED SUBMINIATURIZED SUBORDINATENESS SUPERABUNDANCES SUPERABUNDANTLY SUPERADDITIONAL SUPERCALENDERED SUPERFICIALISED SUPERFICIALIZED SUPERINDIVIDUAL SUPERORDINATING SUPERORDINATION SUPERSTIMULATED SYNARTHRODIALLY TATTERDEMALIONS TERRITORIALISED TETARTOHEDRISMS TETRAETHYLLEADS TRADITIONALISED TRADITIONALISES TRADITIONALISMS TRADITIONALISTS TRADITIONALIZES TRANSCENDENCIES TRANSCENDENTALS TRANSGENDERISMS TRANSLUCIDITIES TRANSPARENTISED TRANSPARENTIZED TRANSPORTEDNESS TRICHOMONACIDES TRIIODOMETHANES TRISOCTAHEDRONS TRUEHEARTEDNESS TYNDALLIMETRIES ULTRACREPIDATES ULTRAFASTIDIOUS ULTRAMODERNISMS ULTRAMODERNISTS UNADVENTUROUSLY UNCHRISTIANISED UNCHRISTIANIZED UNCONSTRAINEDLY UNCREATEDNESSES UNDEMONSTRATIVE UNDERACTIVITIES UNDERCAPITALISE UNDERDIAGNOSING UNDEREMPHASISED UNDEREMPHASISES UNDEREMPHASIZED UNDEREMPHASIZES UNDERESTIMATING UNDERESTIMATION UNDERGRADUETTES UNDERHANDEDNESS UNDERINFLATIONS UNDERSTANDINGLY UNDERSTATEMENTS UNDERVALUATIONS UNDESIRABLENESS UNENDURABLENESS UNGUARDEDNESSES UNLEARNEDNESSES UNPRACTISEDNESS UNREADABILITIES UNSPIRITUALISED UNSPIRITUALIZED UNTRANSMIGRATED UNWEARIEDNESSES UPGRADABILITIES UTILITARIANISED VALETUDINARIANS VICISSITUDINARY WARMHEARTEDNESS WITHDRAWNNESSES WRONGHEADEDNESS