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