There are 433 fifteen-letter words containing A, C, L and 2S, https://www.bestwordlist.com/c/a/5/15letterwordswithaclss.htm ACCESSIBILITIES ACCOMPLISHMENTS ACCOUNTABLENESS ACHONDROPLASIAS AEROELASTICIANS AGRANULOCYTOSES AGRANULOCYTOSIS ALCOHOLISATIONS ALLEGORICALNESS ANCYLOSTOMIASES ANCYLOSTOMIASIS ANTIALCOHOLISMS ANTICAPITALISMS ANTICAPITALISTS ANTICONVULSANTS ANTICONVULSIVES ANTINEOPLASTICS ANTINUCLEARISTS ANTIPHLOGISTICS ANTIRADICALISMS ANTISOCIALITIES ANTISYPHILITICS APOCALYPTICISMS ASCLEPIADACEOUS ASSOCIABILITIES ASTROPHYSICALLY ATHEROSCLEROSES ATHEROSCLEROSIS BACTERIOLOGISTS BIDIALECTALISMS BLOCKHEADEDNESS CAPITALISATIONS CARAMELISATIONS CATEGORICALNESS CAUSELESSNESSES CEASELESSNESSES CENSURABILITIES CENTRALISATIONS CENTRICALNESSES CENTRIFUGALISES CENTRIPETALISMS CHALCOGRAPHISTS CHANCELLORSHIPS CHANGEFULNESSES CHANNELISATIONS CHAPTALISATIONS CHLORITISATIONS CHOLESTYRAMINES CHOLINESTERASES CHROMATOLOGISTS CIRCUMSTANTIALS CLAMOROUSNESSES CLANDESTINENESS CLANDESTINITIES CLASSICALNESSES CLASSIFICATIONS CLASSLESSNESSES CLAUSTROPHILIAS CLAUSTROPHOBIAS CLEARHEADEDNESS CLEAVABLENESSES CLEISTOGAMOUSLY COESSENTIALNESS COLDHEARTEDNESS COLONISATIONIST COLORABLENESSES COLORFASTNESSES COMFORTABLENESS COMMENDABLENESS COMMONPLACENESS COMPASSIONATELY COMPLIANTNESSES COMPLICATEDNESS COMRADELINESSES CONCEIVABLENESS CONCEPTUALISERS CONFESSIONALISM CONFESSIONALIST CONFORMABLENESS CONFUSABILITIES CONGEALABLENESS CONGENIALNESSES CONGRESSIONALLY CONQUERABLENESS CONSENTANEOUSLY CONSIMILARITIES CONSTITUTIONALS CONSULTANTSHIPS CONTESTABLENESS CONTINENTALISMS CONTINENTALISTS CONTINUALNESSES CONVALESCENCIES CONVERSABLENESS CONVULSIONARIES CORPOREALNESSES CORPUSCULARIANS CORRELATIVENESS COSMOPOLITANISM COUNTERASSAULTS CRAPULOUSNESSES CRESTFALLENNESS CRUCIVERBALISMS CRUCIVERBALISTS CRYSTALISATIONS CRYSTALIZATIONS CRYSTALLINITIES CRYSTALLISATION CYCLOOXYGENASES CYLINDRICALNESS DECASUALISATION DECIMALISATIONS DECOLONISATIONS DECOLORISATIONS DELOCALISATIONS DESACRALISATION DESPICABILITIES DIALECTOLOGISTS DICTATORIALNESS DISACKNOWLEDGES DISAPPLICATIONS DISARTICULATORS DISCIPLINARIANS DISCIPLINARIUMS DISCOLOURATIONS DISCOMBOBULATES DISCONSOLATIONS DISGRACEFULNESS DISINCLINATIONS DISSOCIABLENESS DODECASYLLABLES DOLICHOSAURUSES DYSLOGISTICALLY ECCLESIASTICISM ECCLESIOLATRIES ECLAIRCISSEMENT EDUCATIONALISTS EFFECTUALNESSES ELECTROANALYSES ELECTROANALYSIS ELECTRODIALYSES ELECTRODIALYSIS EMPIRICALNESSES EMULSIFICATIONS ENCYCLOPAEDISMS ENCYCLOPAEDISTS EPISCOPALIANISM EQUIVOCALNESSES ESEMPLASTICALLY EVANGELICALISMS EVANGELICALNESS EXCEPTIONALISMS EXCEPTIONALISTS EXCEPTIONALNESS EXCITABLENESSES EXCLAUSTRATIONS EXCUSABLENESSES EXECRABLENESSES FANATICALNESSES FANTASTICALNESS FETISHISTICALLY FORENSICALITIES GLOSSOGRAPHICAL GRACELESSNESSES GRAMMATICALNESS GRAPHICALNESSES HEPATICOLOGISTS HOMOSOCIALITIES HYDROCEPHALUSES IDENTICALNESSES IDIOMATICALNESS IDIOTICALNESSES ILLOGICALNESSES IMMEDICABLENESS IMPLICATIVENESS IMPRACTICALNESS INACCESSIBILITY INCAPABLENESSES INCREMENTALISMS INCREMENTALISTS INCURABLENESSES INEFFECTUALNESS INEXCUSABLENESS INSCRIBABLENESS INSCRUTABLENESS INSOCIABILITIES INTERSCHOLASTIC INTERSECTIONALS INTRACTABLENESS INTRINSICALNESS IRASCIBLENESSES IRREVOCABLENESS ISMATICALNESSES KAFFEEKLATSCHES LACTIFEROUSNESS LARYNGOSCOPISTS LEUCAEMOGENESES LEUCAEMOGENESIS LEXICALISATIONS LEXICOGRAPHISTS LICENTIATESHIPS LISSENCEPHALIES LISSENCEPHALOUS LUCRATIVENESSES MALICIOUSNESSES MASCULINENESSES MASCULINISATION MASOCHISTICALLY MATCHLESSNESSES MATRIARCHALISMS MEDICALISATIONS MERCURIALNESSES MESATICEPHALIES MESATICEPHALOUS METALINGUISTICS MICROPULSATIONS MICROSATELLITES MISAPPLICATIONS MISCALCULATIONS MISCELLANARIANS MISCELLANEOUSLY MISCORRELATIONS MISVOCALISATION MULTIRACIALISMS MUSCULOSKELETAL MUSICALISATIONS MUSICALIZATIONS NEOCOLONIALISMS NEOCOLONIALISTS NONCONSENSUALLY NONELASTICITIES NONSENSICALNESS NONSPECTACULARS NUCLEARISATIONS OCCASIONALITIES OMOPLATOSCOPIES OPHTHALMOSCOPES ORACULOUSNESSES OSCILLOGRAPHIES OVERCAPITALISES OVERCENTRALISES OVERCLASSIFYING OVERSPECIALISED OVERSPECIALISES OVERSPECIALIZES PALEOECOLOGISTS PARADOXICALNESS PARALINGUISTICS PARASITICALNESS PARTICULARISERS PASSIFLORACEOUS PATRIARCHALISMS PEACEABLENESSES PEACELESSNESSES PENTADACTYLISMS PERISSODACTYLES PERISSODACTYLIC PERISSOSYLLABIC PERSPICACIOUSLY PESSIMISTICALLY PHALLOCENTRISMS PHARISAICALNESS PHARMACOLOGISTS PHARMACOPOLISTS PHYLLOSILICATES PICTORIALNESSES PINEALECTOMISES PLACELESSNESSES PLASTICISATIONS PLASTICIZATIONS POLITICISATIONS POLYCHROMATISMS POLYSACCHARIDES POLYSACCHAROSES POLYSYLLABICISM POSTADOLESCENCE POSTADOLESCENTS POSTAPOCALYPSES POSTCONSONANTAL PRACTICABLENESS PRACTICALNESSES PRAGMATICALNESS PREADOLESCENCES PREDICTABLENESS PREJUDICIALNESS PRINCIPALNESSES PROCELEUSMATICS PROCESSIONALIST PROSAICALNESSES PSYCHOANALYSERS PSYCHOANALYSING PSYCHOANALYZERS PSYCHOCHEMICALS PSYCHOSEXUALITY PURITANICALNESS QUADRISYLLABICS RADICALISATIONS RECANALISATIONS RECOLONISATIONS RECOVERABLENESS RECRYSTALLISING REPROACHFULNESS RESECTABILITIES RESOCIALISATION RESPECTABILISED RESPECTABILISES RESPECTABILIZES RESPECTABLENESS REVOCABLENESSES SACERDOTALISING SACRAMENTALISMS SACRAMENTALISTS SACRAMENTALNESS SALACIOUSNESSES SALPINGECTOMIES SANCTIMONIOUSLY SANGUINOLENCIES SANSCULOTTERIES SATANICALNESSES SATIRICALNESSES SCANDALISATIONS SCANDALIZATIONS SCAPHOCEPHALICS SCAPHOCEPHALIES SCAPHOCEPHALISM SCAPHOCEPHALOUS SCATHEFULNESSES SCEUOPHYLACIUMS SCHILLERISATION SCHOLARLINESSES SCHOOLMASTERING SCHOOLMASTERISH SCHOOLTEACHINGS SCINTILLASCOPES SCLERODERMATOUS SCLEROTHERAPIES SCLEROTISATIONS SCLEROTIZATIONS SCRATCHBUILDERS SEARCHABILITIES SECULARISATIONS SECULARIZATIONS SEISMOGRAPHICAL SEISMOLOGICALLY SEMICENTENNIALS SEMICOLONIALISM SEMICRYSTALLINE SEMITRANSLUCENT SEROPREVALENCES SERVICEABLENESS SILICIFICATIONS SIMPLIFICATIONS SKEPTICALNESSES SKETCHABILITIES SOCIALISTICALLY SOCIOHISTORICAL SOLIDIFICATIONS SOLIPSISTICALLY SOPHISTICATEDLY SPECIALISATIONS SPECIALIZATIONS SPECTROSCOPICAL SPECULATIVENESS SPERMATOBLASTIC SPHAEROCRYSTALS SPHERICALNESSES SPIRONOLACTONES SPLANCHNOLOGIES STAPHYLOPLASTIC STEEPLECHASINGS STEGOCEPHALIANS STRAITLACEDNESS STRATICULATIONS STRATOSPHERICAL STRATOVOLCANOES STREPTOBACILLUS STRUCTURALISING STULTIFICATIONS SUBCIVILISATION SUBSPECIALISING SUBSPECIALITIES SUBSPECIALIZING SUBSPECIFICALLY SUBVOCALISATION SULPHACETAMIDES SUPERFICIALISED SUPERFICIALISES SUPERFICIALIZES SUPERFICIALNESS SUPERPLASTICITY SUPERSPECIALIST SUPERSPECTACLES SUPERSTRUCTURAL SUSPERCOLLATING SYLLOGISTICALLY SYMBOLISTICALLY SYMMETRICALNESS SYNCHRONISTICAL SYNERGISTICALLY TEACHABLENESSES TECHNICALNESSES TELANGIECTASIAS THALASSOCRACIES THALASSOGRAPHIC THEOSOPHISTICAL THORACOPLASTIES TOUCHABLENESSES TRACEABLENESSES TRACKLESSNESSES TRACTABLENESSES TRANSCENDENTALS TRANSHISTORICAL TRANSLUCIDITIES ULTRAPRECISIONS ULTRASTRUCTURES UNCANONICALNESS UNCLEANLINESSES UNCLIMBABLENESS UNEQUIVOCALNESS UNMUSICALNESSES UNPEACEABLENESS UNPRACTICALNESS UNSOCIABILITIES UNTACTFULNESSES UNTEACHABLENESS UNTRACTABLENESS VASCULARISATION VERTICILLASTERS VISCOELASTICITY VISCOSIMETRICAL WATERCOLOURISTS WELTANSCHAUUNGS WHIMSICALNESSES