There are 855 thirteen-letter words containing 2A, C, I and S, https://www.bestwordlist.com/c/a/5/13letterwordswithaacis.htm ABSTRACTIONAL ABSTRACTIVELY ABYSSOPELAGIC ACADEMICALISM ACATAMATHESIA ACCELERATIONS ACCENTUATIONS ACCESSARINESS ACCIACCATURAS ACCIDENTALISM ACCLIMATISERS ACCLIMATISING ACCLIMATIZERS ACCOMPANYISTS ACCOUNTANCIES ACCUMULATIONS ACCUSTOMATION ACHLORHYDRIAS ACHROMATISING ACHROMATOPSIA ACQUAINTANCES ACQUISITIONAL ACTUALISATION ADIAPHORISTIC ADJUDICATIONS ADMINICULATES AERIFICATIONS AEROACOUSTICS AEROMECHANICS AESTHETICALLY AESTHETICIANS AFFRANCHISING AGONISTICALLY AGRICHEMICALS AGROCHEMICALS AHISTORICALLY AICHMOPHOBIAS ALCHEMISTICAL ALEMBICATIONS ALEXIPHARMICS ALPHANUMERICS AMBIVALENCIES AMICABILITIES AMPHISTOMATIC ANACATHARTICS ANACHRONISTIC ANALPHABETICS ANALYTICITIES ANAPHRODISIAC ANECDOTALISMS ANECDOTALISTS ANENCEPHALIAS ANENCEPHALIES ANFRACTUOSITY ANGIOSARCOMAS ANGLICISATION ANGLOPHOBIACS ANIMALCULISMS ANIMALCULISTS ANNUNCIATIONS ANOMALISTICAL ANTARTHRITICS ANTASTHMATICS ANTIAIRCRAFTS ANTIASTHMATIC ANTIBALLISTIC ANTIBLACKISMS ANTICATALYSTS ANTICHRISTIAN ANTICIPATIONS ANTICLASSICAL ANTICLERICALS ANTICOLONIALS ANTIDESICCANT ANTIDIABETICS ANTIMACASSARS ANTIMECHANIST ANTINARCOTICS ANTIPARASITIC ANTIPARTICLES ANTIRACHITICS ANTIROMANTICS ANTISOCIALISM ANTISOCIALIST ANTISOCIALITY ANTISPASMODIC APHRODISIACAL APOCALYPTISMS APOCALYPTISTS APOCATASTASIS APOCHROMATISM APOSTOLICALLY APPRECIATIONS APPROPRIACIES AQUACEUTICALS AQUACULTURIST ARABICISATION ARACHNOIDITIS ARACHNOLOGIES ARACHNOLOGIST ARBITRATRICES ARCHAEOLOGIES ARCHAEOLOGIST ARCHAEORNISES ARCHEGONIATES ARCHIPELAGOES ARCHOSAURIANS ARISTOCRACIES ARISTOCRATISM ARISTOLOCHIAS AROMATICITIES ARTICULATIONS ARTIFICIALISE ARUNDINACEOUS ASCERTAINABLE ASCERTAINABLY ASCERTAINMENT ASSOCIABILITY ASSOCIATESHIP ASSOCIATIONAL ASSOCIATIVELY ASSOCIATIVITY ASSUEFACTIONS ASTACOLOGICAL ASTACOLOGISTS ASTHMATICALLY ASTRODYNAMICS ASTROMETRICAL ASTRONAUTICAL ASTROPHYSICAL ASYNDETICALLY ATAVISTICALLY ATHEISTICALLY ATMOSPHERICAL ATOMISTICALLY ATTRACTANCIES ATYPICALITIES AUDACIOUSNESS AUDIOCASSETTE AUSCULTATIONS AUTHENTICATES AUTOCATALYSIS AUTOCEPHALIES AUTORICKSHAWS AUTOSCHEDIASM AUTOSCHEDIAZE BACCHANALIANS BACKSLAPPINGS BACKSTABBINGS BACKSTARTINGS BACKSTRAIGHTS BACKTRACKINGS BACTERIOSTATS BACTERISATION BALLISTICALLY BASIFICATIONS BIBLIOMANIACS BICAMERALISMS BICAMERALISTS BIOSTATICALLY BLACKBALLINGS BLACKGUARDISM BOMBASTICALLY BORAGINACEOUS BOTANOMANCIES BRACHIOSAURUS BRAGGADOCIOUS BRASSICACEOUS BREAKDANCINGS BROADCASTINGS BUREAUCRACIES BUREAUCRATISE BUREAUCRATISM BUREAUCRATIST CABBALISTICAL CABINETMAKERS CACHINNATIONS CAESAROPAPISM CALCARIFEROUS CALEFACTORIES CALENDARISING CALLIGRAPHERS CALLIGRAPHIES CALLIGRAPHIST CALUMNIATIONS CAMPANOLOGIES CAMPANOLOGIST CANALISATIONS CANALIZATIONS CANCELLATIONS CANCERPHOBIAS CANDIDATESHIP CANNIBALISING CANNIBALISTIC CANONISATIONS CANONIZATIONS CANTILLATIONS CANTONISATION CAPACIOUSNESS CAPACITATIONS CAPERCAILLIES CAPERCAILZIES CAPILLARITIES CAPITULATIONS CAPNOGRAPHIES CARAVANSARAIS CARAVANSARIES CARAVANSERAIS CARBONISATION CARBURISATION CARCINOMATOUS CARDBOARDIEST CARDINALITIES CARDINALSHIPS CARDIOPATHIES CARDIOPLEGIAS CARDSHARPINGS CARICATURISTS CARNIVALESQUE CARRAGHEENINS CARTELISATION CARTILAGINOUS CARTOGRAPHIES CASTABILITIES CASTELLATIONS CASUALISATION CASUALIZATION CASUISTICALLY CATALOGUISING CATAMOUNTAINS CATASTROPHISM CATASTROPHIST CATECHISATION CATECHISTICAL CATERWAULINGS CAUSABILITIES CAUSATIONISMS CAUSATIONISTS CAUSATIVENESS CAUTERISATION CELIBATARIANS CEPHALISATION CHAIRMANSHIPS CHALAZOGAMIES CHALCANTHITES CHAPLAINSHIPS CHARACTERISED CHARACTERISER CHARACTERISES CHARACTERISMS CHARACTERIZES CHARLATANISMS CHARLATANRIES CHROMATOPSIAS CICATRISATION CIRCUMAMBAGES CLADISTICALLY CLAIRAUDIENTS CLAIRVOYANCES CLAMJAMPHRIES CLASSICALISMS CLASSICALISTS CLASSICALNESS CLAUDICATIONS CLAUSTRATIONS CLAVICEMBALOS CLEPTOMANIACS CLISHMACLAVER COACERVATIONS COADAPTATIONS COADJACENCIES COCAINISATION COENAESTHESIA COHABITATIONS COLLATERALISE COMMENTARIATS COMMISSARIATS COMPANIONWAYS COMPARATIVIST COMPASSIONATE COMPLAISANCES COMPLAISANTLY COMPLANATIONS CONCANAVALINS CONCLAMATIONS CONFISCATABLE CONNATURALISE CONSERVATORIA CONSTATATIONS CONSTRAINABLE CONTAMINATORS CONTRABANDISM CONTRABANDIST CONTRABASSIST CONTRARIANISM COPARCENARIES COPLANARITIES CRAFTMANSHIPS CRAFTSMANLIKE CRAFTSMANSHIP CRAPEHANGINGS CRYPTANALYSIS CRYSTALISABLE CRYSTALIZABLE CRYSTALLOIDAL CURARISATIONS CURARIZATIONS CYTOCHALASINS DEACTIVATIONS DEARTICULATES DECAFFEINATES DECALCOMANIAS DECAPITALISED DECAPITALISES DECAPITALIZES DECAPITATIONS DECAPSULATING DECAPSULATION DECASUALISING DECASUALIZING DECASYLLABICS DEGLACIATIONS DERACIALISING DERACINATIONS DESACRALISING DESACRALIZING DEXTROCARDIAS DIAGNOSTICIAN DIALECTICIANS DIALOGISTICAL DIATHERMACIES DIBRANCHIATES DILACERATIONS DIPSOMANIACAL DISACCHARIDES DISAFFIRMANCE DISALLOWANCES DISAPPEARANCE DISARTICULATE DISASSOCIATED DISASSOCIATES DISCAPACITATE DISCHARGEABLE DISCLAMATIONS DISPLEASANCES DIVARICATIONS DOCTRINARIANS DRACONIANISMS DUALISTICALLY ECOTARIANISMS ECTOPARASITES ECTOPARASITIC ELASTICATIONS ELEPHANTIASIC EMANCIPATIONS EMASCULATIONS ENCAPSULATING ENCAPSULATION ENCARNALISING ENCAUSTICALLY ENCOMIASTICAL ENDOPARASITIC EPINASTICALLY EPISCOPALIANS ERGATOCRACIES ETHEROMANIACS EUPHAUSIACEAN EXACERBATIONS FACILITATIONS FACTIONALISED FACTIONALISES FACTIONALISMS FACTIONALISTS FACTIONALIZES FACTORISATION FALSIFICATION FANATICALNESS FANTASMICALLY FANTASTICALLY FANTASTICATED FANTASTICATES FANTASTICISMS FARCICALITIES FASCICULATELY FASCICULATION FASCINATINGLY FASCISTICALLY FAUNISTICALLY FIBROSARCOMAS FIBROVASCULAR FINANCIALISTS FLAMBOYANCIES FOCALISATIONS FOCALIZATIONS FORECARRIAGES FRACTIONALISE FRACTIONALISM FRACTIONALIST FRACTIONATORS FRANCISATIONS FRANCIZATIONS FRANCOPHOBIAS GALACTOSAEMIA GALACTOSAEMIC GALACTOSAMINE GALACTOSEMIAS GALACTOSIDASE GALLICISATION GALVANOSCOPIC GAMIFICATIONS GASIFICATIONS GASTROLOGICAL GASTROMANCIES GASTRONOMICAL GENTIANACEOUS GERIATRICIANS GRAMMATICISED GRAMMATICISES GRAMMATICISMS GRAMMATICIZES GRAPHICALNESS GYMNASTICALLY GYNAECOMASTIA GYNECOMASTIAS HAEMODYNAMICS HAEMOPHILIACS HALLUCINATORS HANDICRAFTERS HARUSPICATING HARUSPICATION HEMATOBLASTIC HEMIPARASITIC HEPTASYLLABIC HOCHMAGANDIES HOLOPARASITIC HYDROSTATICAL HYPOCALCEMIAS ICHTHYOFAUNAS IDIOPLASMATIC IMAGISTICALLY INACTIVATIONS INARTICULATES INCAPABLENESS INCAPACITANTS INCAPACITATES INCAPSULATING INCAPSULATION INCARCERATORS INCATENATIONS INCRASSATIONS INCRASSATIVES INELASTICALLY INHABITANCIES INTERCALARIES INTERGLACIALS INTERSCAPULAR INTRACAPSULAR INTRAMUSCULAR INTRAVASCULAR ISMATICALNESS ISOCARBOXAZID ISOSTATICALLY ITALICISATION KERATOPLASTIC KLEPTOMANIACS LACHRYMATIONS LACKADAISICAL LACTOBACILLUS LAPAROSCOPIES LAPAROSCOPIST LOCALISATIONS LOCALIZATIONS MACHAIRODONTS MACHIAVELIANS MACROCLIMATES MAGISTRATICAL MAGNETOSTATIC MAGNOLIACEOUS MAJOLICAWARES MALACOLOGISTS MALACOPHILIES MALACOPHILOUS MANNERISTICAL MANUFACTORIES MARCONIGRAPHS MARISCHALLING MARSIPOBRANCH MASSIFICATION MASTICATORIES MATERIALISTIC MATERNALISTIC MATHEMATICISE MATHEMATICISM MATRIARCHATES MATRICULATORS MECAMYLAMINES MECHANICALISM MECHANISATION MEGACEPHALIES MEGALOBLASTIC MEGALOCARDIAS MEGALOMANIACS MELANCHOLIACS MELODRAMATICS MESATICEPHALY MESSIANICALLY METACERCARIAS METAPHYSICIAN METAPSYCHICAL METASILICATES MICROANALYSES MICROANALYSIS MICROANALYSTS MICROBALANCES MICROFILARIAS MICROHABITATS MICROMANAGERS MICROPARASITE MICROVASCULAR MISALLOCATING MISALLOCATION MISAPPRECIATE MISARTICULATE MISCALCULATED MISCALCULATES MISCALCULATOR MISCATALOGING MISCATALOGUED MISCATALOGUES NANOPARTICLES NARCOANALYSIS NARCOTISATION NARROWCASTING NATIONALISTIC NAZIFICATIONS NECESSITARIAN NEOCAPITALISM NEOCAPITALIST NEURASTHENIAC NONASSOCIATED NONCANDIDATES NONCAPITALIST NONSECTARIANS NOSTALGICALLY NYMPHOMANIACS OCCASIONALISM OCCASIONALIST OCCASIONALITY OCTOGENARIANS ONOMASTICALLY ONOMASTICIANS ORACULARITIES ORCHIDOMANIAS ORGIASTICALLY OSCILLATIONAL OSTEOMALACIAL OSTEOMALACIAS OVERDRAMATICS PACIFICATIONS PACKABILITIES PAEDOPHILIACS PALAEOCRYSTIC PALIFICATIONS PANCHROMATISM PANCYTOPENIAS PANIFICATIONS PANSOPHICALLY PANTHEISTICAL PANTISOCRATIC PARACHRONISMS PARALLELISTIC PARAMOUNTCIES PARAPSYCHICAL PARAPSYCHISMS PARAPSYCHOSIS PARASCENDINGS PARASITICALLY PARASITICIDAL PARASITICIDES PARASITOLOGIC PARASYMBIOTIC PARASYNTHETIC PARFOCALISING PARFOCALITIES PAROCCIPITALS PAROCHIALISED PAROCHIALISES PAROCHIALISMS PAROCHIALIZES PARTICIPATORS PARTICULARISE PARTICULARISM PARTICULARIST PASIGRAPHICAL PATERNALISTIC PATRIARCHATES PATRIARCHISMS PATRISTICALLY PEDIATRICIANS PEIRASTICALLY PENTASYLLABIC PHARISAICALLY PHARMACEUTICS PHARMACEUTIST PHARMACOPEIAS PHYSHARMONICA PIACULARITIES PIANISTICALLY PISCATORIALLY PLACABILITIES PLACENTATIONS PLAGIOCLASTIC PLANTOCRACIES PLASTOCYANINS POSTCLASSICAL POSTCRANIALLY POSTTRAUMATIC POTICHOMANIAS PRACTICALISMS PRACTICALISTS PRACTICALNESS PRAGMATICISMS PRAGMATICISTS PRECAPITALIST PREECLAMPSIAS PREFABRICATES PREVARICATORS PRISMATICALLY PROCAPITALIST PROCARBAZINES PROCELLARIANS PROCLAMATIONS PROCRASTINATE PROSAICALNESS PSYCHASTHENIA PSYCHIATRICAL PSYCHOMACHIAS QUADRAPHONICS QUADRAPLEGICS QUALIFICATORS QUANGOCRACIES QUASICRYSTALS QUASIPARTICLE RACEMISATIONS RACEMIZATIONS RADICALNESSES RADIOPACITIES RAMIFICATIONS RAPACIOUSNESS RAREFICATIONS RATIFICATIONS RATIOCINATORS RATIONALISTIC REACCLIMATISE REACTIONARIES REACTIONARISM REACTIONARIST REACTIVATIONS READMITTANCES REALISTICALLY REALLOCATIONS REARTICULATES RECALCITRANTS RECALCITRATES RECAPITALISED RECAPITALISES RECAPITALIZES RECAPITULATES REESCALATIONS RELANDSCAPING RETRACTATIONS RHABDOMANCIES RHAPSODICALLY SACCHARIFYING SACCHARIMETER SACCHARIMETRY SACERDOTALISE SACERDOTALISM SACERDOTALIST SACERDOTALIZE SACRALISATION SACRALIZATION SACRIFICEABLE SACRIFICIALLY SACROSANCTITY SADOMASOCHISM SADOMASOCHIST SAFECRACKINGS SAGACIOUSNESS SALACIOUSNESS SALICYLAMIDES SALIFICATIONS SALVINIACEOUS SANCTUARISING SANCTUARIZING SARCASTICALLY SATANICALNESS SATIRICALNESS SATISFACTIONS SCALABILITIES SCALARIFORMLY SCAPEGOATINGS SCAPEGOATISMS SCAPHOCEPHALI SCAPULIMANTIC SCAPULOMANTIC SCARAMOUCHING SCARIFICATION SCARIFICATORS SCATTERATIONS SCATTERBRAINS SCENARISATION SCENARIZATION SCEUOPHYLACIA SCHEMATICALLY SCHISMATICALS SCHIZAEACEOUS SCHOLASTICATE SCLEROMALACIA SCROPHULARIAS SEARCHABILITY SECOBARBITALS SECRETARIATES SECTARIANISED SECTARIANISES SECTARIANISMS SECTARIANIZED SECTARIANIZES SEMIABSTRACTS SEMIAUTOMATIC SEMICARBAZIDE SEMICARBAZONE SEMICLASSICAL SEMIPARASITIC SHADOWCASTING SHAMBOLICALLY SIMARUBACEOUS SOCIALISATION SOCIALIZATION SOMATOLOGICAL SOMATOPLASTIC SPADICIFLORAL SPASMODICALLY SPEARCARRIERS SPERMATICALLY SPERMATOCIDAL SPHACELATIONS SQUIRARCHICAL STACCATISSIMO STAGECOACHING STALACTITICAL STALACTITIOUS STALAGMITICAL STATISTICALLY STATISTICIANS STAYCATIONERS STIGMATICALLY STRAIGHTLACED STRAITJACKETS STRAITLACEDLY STRATEGETICAL STRATEGICALLY STRATIGRAPHIC STRATOCRACIES SUBALLOCATING SUBALLOCATION SUBARACHNOIDS SUBARCUATIONS SUBCLAVICULAR SUBDIACONATES SUBFACTORIALS SUBURBICARIAN SULFACETAMIDE SUPRACHIASMIC SYBARITICALLY SYCOPHANTICAL SYLLABICATING SYLLABICATION SYMPATHETICAL SYMPATRICALLY SYMPTOMATICAL SYNALLAGMATIC SYNAPOSEMATIC SYNTACTICALLY SYNTACTICIANS SYSTEMATICIAN TACHYGRAPHIES TACHYGRAPHIST TACHYPHRASIAS TACHYPHYLAXIS TAUTOSYLLABIC TECHNOMANIACS TETRABASICITY TETRASYLLABIC THALASSAEMICS THAUMATURGICS THEATRICALISE THEATRICALISM THRASONICALLY TIMBROMANIACS TRACTORATIONS TRADESCANTIAS TRADUCIANISMS TRADUCIANISTS TRANSACTINIDE TRANSACTIONAL TRANSATLANTIC TRANSCRIBABLE TRANSCRIPTASE TRANSLOCATING TRANSLOCATION TRANSMITTANCE TRANSMITTANCY TRANSTHORACIC TRISACCHARIDE TRISOCTAHEDRA TRISYLLABICAL ULTRACAUTIOUS ULTRADISTANCE ULTRAPHYSICAL ULTRARADICALS UNAPOSTOLICAL UNASCERTAINED UNCAPITALISED UNCHARISMATIC UNCHASTISABLE UNCHASTIZABLE UNCOMPLAISANT UNICAMERALISM UNICAMERALIST UNMACADAMISED UNSCABBARDING VACATIONLANDS VACUOLISATION VALPOLICELLAS VASCULARISING VASCULARITIES VASCULARIZING VATICINATIONS VERNACULARISE VERNACULARISM VERNACULARIST VOCABULARIANS VOCALISATIONS VOCALIZATIONS VOCATIONALISM VOCATIONALIST VOLCANISATION VRAISEMBLANCE VULCANISATION WAISTCOATEERS WAISTCOATINGS XANTHOCHROIAS YACHTSMANSHIP ZANTEDESCHIAS