There are 523 thirteen-letter words containing A, C, L and 2S, https://www.bestwordlist.com/c/a/5/13letterwordswithaclss.htm ABYSSOPELAGIC ACCESSIBILITY ACCLIMATISERS ACCOMPLISHERS ACIDOPHILUSES AFFECTIONLESS ALKALESCENCES ANECDOTALISMS ANECDOTALISTS ANIMALCULISMS ANIMALCULISTS ANTIBLACKISMS ANTICATALYSTS ANTICLASSICAL ANTISOCIALISM ANTISOCIALIST APICULTURISTS APOCALYPTISMS APOCALYPTISTS APOSTOLICISMS ARCHEOLOGISTS ARCTOPHILISTS ARISTOLOCHIAS ASSEMBLAUNCES ASSOCIABILITY ASSOCIATIONAL ASSOCIATIVELY ASTACOLOGISTS ASTROPHYSICAL AUSCULTATIONS AUTOCATALYSES AUTOCATALYSIS AVICULTURISTS BACHELORSHIPS BACKSLAPPINGS BACTERIOLYSES BACTERIOLYSIS BACULOVIRUSES BALDERLOCKSES BICAMERALISMS BICAMERALISTS BLACKLISTINGS BLANCHISSEUSE BLASTOMYCOSES BLASTOMYCOSIS BOROSILICATES CALLISTHENICS CALLOUSNESSES CALORESCENCES CALYCANTHUSES CANALISATIONS CAPABLENESSES CARDINALSHIPS CARDIOLOGISTS CAREFULNESSES CARTOPHILISTS CASTABILITIES CASTELLATIONS CASUALISATION CASUISTICALLY CAUSABILITIES CAUSELESSNESS CEASELESSNESS CENTRICALNESS CHAENOMELESES CHANGEFULNESS CHAPLAINSHIPS CHARACTERLESS CHARLATANISMS CHOLESTERATES CHONDROBLASTS CHROMATOLYSES CHROMATOLYSIS CIRCULARISERS CIVILISATIONS CLAMOROUSNESS CLARINETTISTS CLASSICALISMS CLASSICALISTS CLASSICALNESS CLASSLESSNESS CLAUSTRATIONS CLEANLINESSES CLEAVABLENESS CLEISTOGAMIES CLEISTOGAMOUS CLOVERGRASSES COALITIONISMS COALITIONISTS COEQUALNESSES COESSENTIALLY COLLEGIALISMS COLONISATIONS COLORABLENESS COLORFASTNESS COLORISATIONS COMICALNESSES COMMENSALISMS COMMUNALISERS COMPANIONLESS COMPLAISANCES COMPLIANTNESS COMPRESSIONAL COMRADELINESS CONFESSIONALS CONGENIALNESS CONGRESSIONAL CONNUBIALISMS CONSIDERABLES CONSOLATORIES CONSOLATRICES CONSOLATRIXES CONSOLIDATORS CONSTABLESHIP CONSULTANCIES CONSULTATIONS CONTAINERLESS CONTINUALNESS CONTRASEXUALS CONVALESCENTS CONVIVIALISTS CORDIALNESSES CORPORALSHIPS CORPOREALISES CORPOREALISMS CORPOREALISTS CORPOREALNESS CORRIVALSHIPS COSMOPOLITANS COUNTERBLASTS CRANIOLOGISTS CRAPULOSITIES CRAPULOUSNESS CRASSULACEOUS CREOLISATIONS CRISTOBALITES CRYPTANALYSES CRYPTANALYSIS CRYPTANALYSTS CRYSTALISABLE CRYSTALLISERS CRYSTALLISING CRYSTALLIZERS CUBICALNESSES CUMULOSTRATUS CURABLENESSES CYBERSTALKERS CYCLODIALYSES CYCLODIALYSIS CYCLOPAEDISTS CYNICALNESSES CYTOCHALASINS DECALESCENCES DECAPITALISES DECASUALISING DECASYLLABICS DECASYLLABLES DECENTRALISES DECENTRALISTS DECLASSIFYING DELICATESSENS DENUCLEARISES DESACRALISING DIALECTICISMS DISALLOWANCES DISCIPLINANTS DISCLAMATIONS DISPLACEMENTS DISPLEASANCES DISSEMBLANCES DISSOCIALISED DISSOCIALISES DISSOCIALIZED DISSOCIALIZES DOLICHOSAURUS DRACUNCULUSES ECCLESIASTICS EFFECTUALNESS ELASMOBRANCHS ELASTICATIONS ELASTICNESSES EMASCULATIONS EMPIRICALNESS ENDONUCLEASES EPISCOPALIANS EPISCOPALISMS EQUIVOCALNESS ESCAPOLOGISTS ESCHATOLOGIES ESCHATOLOGIST ESCHSCHOLTZIA ESCHSCHOLZIAS ETHICALNESSES EUSOCIALITIES EVANGELICISMS EXCITABLENESS EXCUSABLENESS EXECRABLENESS FACTIONALISES FACTIONALISMS FACTIONALISTS FACTUALNESSES FANATICALNESS FASCISTICALLY FICTIONALISES FINANCIALISTS FINICALNESSES FLACCIDNESSES FOCALISATIONS GALACTOSEMIAS GALACTOSIDASE GALVANOSCOPES GESELLSCHAFTS GESTICULATORS GLACIOLOGISTS GLAUCESCENCES GLOSSOLOGICAL GRACELESSNESS GRACILENESSES GRAPHICALNESS HARDSCRABBLES IDENTICALNESS IDIOTICALNESS ILLOGICALNESS INCALESCENCES INCAPABLENESS INCUNABULISTS INCURABLENESS INDISSOCIABLE INDISSOCIABLY INOSCULATIONS IRASCIBLENESS ISMATICALNESS ISOCHEIMENALS ISOSMOTICALLY ISOSTATICALLY JUSTICIALISMS KALEIDOSCOPES LAPAROSCOPIES LAPAROSCOPIST LAPIDESCENCES LARYNGOSCOPES LEUCOPLASTIDS LIMACOLOGISTS LISSENCEPHALY LOCALISATIONS LOGICALNESSES LOWERCLASSMAN LOWERCLASSMEN LUCRATIVENESS LUMBRICALISES LYRICALNESSES MALACOLOGISTS MALICIOUSNESS MALOCCLUSIONS MASCULINENESS MASCULINISING MASCULINITIES MASTERCLASSES MATCHLESSNESS MERCANTILISMS MERCANTILISTS MERCURIALISES MERCURIALISMS MERCURIALISTS MERCURIALNESS MESOCEPHALICS MESOCEPHALIES MESOCEPHALISM MESOCEPHALOUS MESSIANICALLY METASILICATES MICROANALYSES MICROANALYSIS MICROANALYSTS MICROCAPSULES MICROCRYSTALS MICROPLASTICS MISCALCULATES MISCATALOGUES MISCELLANEOUS MISCELLANISTS MISCHALLENGES MISCLASSIFIED MISCLASSIFIES MISPLACEMENTS MULTIACCESSES MULTICAMPUSES MUNICIPALISES MUNICIPALISMS MUNICIPALISTS MUSCULARITIES MUSICALNESSES MUSICIANLIEST MUSSELCRACKER MYCOPLASMOSES MYCOPLASMOSIS NARCOANALYSES NARCOANALYSIS NEOCLASSICISM NEOCLASSICIST NEOPLASTICISM NEOPLASTICIST NEOSCHOLASTIC NOCTAMBULISMS NOCTAMBULISTS NONCLASSIFIED NONCLASSROOMS NONCONSENSUAL NONSENSICALLY NONSOCIALISTS NONSPECIALIST NUCLEOCAPSIDS NUCLEOTIDASES OCCASIONALISM OCCASIONALIST OCEANOLOGISTS OCTOSYLLABICS OCTOSYLLABLES ORACULOUSNESS ORCHESTRALIST OSCILLOGRAPHS OSTEOMALACIAS PAROCHIALISES PAROCHIALISMS PEACEABLENESS PEACELESSNESS PEARLESCENCES PERISSODACTYL PERSONALISTIC PESSIMISTICAL PHYSICALISTIC PHYSICALITIES PICTORIALISES PICTORIALISMS PICTORIALISTS PICTORIALNESS PLACELESSNESS PLASTOCYANINS PLICATENESSES POLITICALISES POLITICASTERS PORCELAINISES PORCELLANISES POSTCLASSICAL POSTDOCTORALS POSTHOLOCAUST PRACTICALISMS PRACTICALISTS PRACTICALNESS PRECALCULUSES PREECLAMPSIAS PRINCIPALNESS PROCESSIONALS PROCONSULATES PROSAICALNESS PROSTACYCLINS PSEUDOCLASSIC PSEUDOSCALARS PSYCHOANALYSE PSYCHOANALYST PSYCHOBABBLES QUASICRYSTALS RADICALNESSES RECALESCENCES RECAPITALISES RECLASSIFYING RECONVALESCES RECRYSTALLISE REESCALATIONS RESOCIALISING REVOCABLENESS RIBONUCLEASES SACERDOTALISE SACERDOTALISM SACERDOTALIST SACRALISATION SALACIOUSNESS SALICYLAMIDES SALIFICATIONS SALVINIACEOUS SANSCULOTTISH SANSCULOTTISM SANSCULOTTIST SARCASTICALLY SATANICALNESS SATIRICALNESS SCALABILITIES SCATHEFULNESS SCEUOPHYLAXES SCHISMATICALS SCHOLARLINESS SCHOLASTICATE SCHOLASTICISM SCHOOLMARMISH SCHOOLMASTERS SCINTILLATORS SCINTILLISCAN SCLERENCHYMAS SCLEROCAULIES SCLEROCAULOUS SCLERODERMIAS SCOPOPHILIACS SCOPTOPHILIAS SCRATCHBUILDS SCRATCHPLATES SCRIPTURALISM SCRIPTURALIST SCROPHULARIAS SCUTELLATIONS SECOBARBITALS SECTIONALISED SECTIONALISES SECTIONALISMS SECTIONALISTS SECTIONALIZES SEISMOLOGICAL SEMICLASSICAL SEMIOFFICIALS SENESCHALSHIP SEPTUPLICATES SESQUIPLICATE SEXTUPLICATES SHELLCRACKERS SKEPTICALNESS SLOCKDOLAGERS SOCIABILITIES SOCIALISATION SOLICITATIONS SOMATOPLASTIC SOPHISTICALLY SPASMODICALLY SPECIALNESSES SPECTRALITIES SPECULARITIES SPECULATRICES SPECULATRIXES SPERMATOCELES SPHACELATIONS SPHAGNICOLOUS SPHERICALNESS SPIFLICATIONS SPRACHGEFUHLS STALACTITIOUS STATISTICALLY STEEPLECHASED STEEPLECHASER STEEPLECHASES STICKHANDLERS STOICALNESSES STRATOCUMULUS STROBILACEOUS STRUCTURALISE STRUCTURALISM STRUCTURALIST STYLISTICALLY SUBADOLESCENT SUBCELESTIALS SUBCLASSIFIED SUBCLASSIFIES SUBFACTORIALS SUBLITERACIES SUBPRINCIPALS SUBSPECIALISE SUBSPECIALIST SUBSPECIALITY SUBSPECIALIZE SUBSTANCELESS SUBSTRUCTURAL SUBVOCALISING SUPERCOLOSSAL SUPERPHYSICAL SUPERPLASTICS SUPERSPECIALS SUPPLICATIONS SURVEILLANCES SUSPERCOLLATE SUSTENTACULAR SUSTENTACULUM SWASHBUCKLERS SWASHBUCKLING SYLLABICITIES SYLLOGISTICAL SYMBOLISTICAL SYNDACTYLISMS SYNDICALISTIC TACTFULNESSES TEACHABLENESS TECHNICALISES TECHNICALNESS THALASSAEMICS THALASSOCRACY THALASSOCRATS TOUCHABLENESS TRACEABLENESS TRACKLESSNESS TRACTABLENESS TRANSILIENCES TRANSLUCENCES TREACLINESSES TYPICALNESSES UNCHASTISABLE UNCLEANLINESS UNCLEANNESSES UNCLEARNESSES UNDERCLASSMAN UNDERCLASSMEN UNDISCUSSABLE UNMUSICALNESS UNNECESSARILY UNPLASTICISED UNSEARCHABLES UNSOCIALITIES UNSPECIALISED UNTACTFULNESS UPPERCLASSMAN UPPERCLASSMEN VASCULARISING VASCULARITIES VESICULATIONS VOCALISATIONS WALKINGSTICKS WHIMSICALNESS