There are 531 thirteen-letter words containing A, C and 3I, https://www.bestwordlist.com/c/a/5/13letterwordswithaciii.htm
ACCEPTIVITIES ACCESSIBILITY ACCLIMATISING ACCLIMATIZING ACETIFICATION
ACIDIFICATION ACIDIMETRICAL ACQUIRABILITY ACQUISITIONAL ACQUISITIVELY
ACTINOBACILLI ADIAPHORISTIC AERIFICATIONS AFFECTIVITIES AHISTORICISMS
AILOUROPHILIC AMICABILITIES AMINOACIDURIA AMPLIFICATION ANALYTICITIES
ANGLICISATION ANGLICIZATION ANTIARTHRITIC ANTIBALLISTIC ANTICHRISTIAN
ANTICIPATIONS ANTICLIMACTIC ANTICLINORIUM ANTICOLLISION ANTIDIABETICS
ANTIDIURETICS ANTIEPILEPTIC ANTIHIJACKING ANTIMICROBIAL ANTINEPHRITIC
ANTIPARASITIC ANTIPERIODICS ANTIPESTICIDE ANTIPOLITICAL ANTIPRURITICS
ANTIRACHITICS ANTISEPTICISE ANTISEPTICISM ANTISEPTICIZE ANTISOCIALISM
ANTISOCIALIST ANTISOCIALITY APOLITICALITY APPLICABILITY ARABICISATION
ARABICIZATION ARACHNOIDITIS ARITHMETICIAN AROMATICITIES ARTIFICIALISE
ARTIFICIALITY ARTIFICIALIZE ASSOCIABILITY ASSOCIATIVITY ATYPICALITIES
BASIFICATIONS BEATIFICATION BEHAVIORISTIC BENEFICIARIES BENEFICIATING
BENEFICIATION BIBLIOGRAPHIC BIBLIOLOGICAL BIBLIOMANCIES BIBLIOMANIACS
BIBLIOPOLICAL BICONCAVITIES BICONDITIONAL BIDIRECTIONAL BIMETALLISTIC
BIOACTIVITIES BIOINFORMATIC BIOMETRICIANS BIOPESTICIDAL BIOSTATISTICS
CALCIFICATION CANISTERISING CANISTERIZING CANNIBALISING CANNIBALISTIC
CANNIBALIZING CAPILLARITIES CAPRIFICATION CARDINALITIAL CARDINALITIES
CARNIFICATION CASTABILITIES CATHOLICISING CATHOLICITIES CATHOLICIZING
CAUSABILITIES CERTIFICATING CERTIFICATION CHICKABIDDIES CHIEFTAINCIES
CHIEFTAINRIES CHIEFTAINSHIP CHYLIFICATION CHYMIFICATION CICATRISATION
CICATRIZATION CIRCULARISING CIRCULARITIES CIRCULARIZING CITIFICATIONS
CITYFICATIONS CIVILIANISING CIVILIANIZING CIVILISATIONS CIVILIZATIONS
CLARIFICATION CLINOPINACOID CLINOPINAKOID CLIOMETRICIAN CLUBABILITIES
COALIFICATION COALITIONISMS COALITIONISTS COCAINISATION COCAINIZATION
CODIFIABILITY CODIFICATIONS COILABILITIES COLINEARITIES COLONIALISING
COLONIALISTIC COLONIALIZING COMBINABILITY COMPATIBILITY CONCILIATIONS
CONSIMILARITY CONVIVIALISTS CORINTHIANISE CORINTHIANIZE CORNIFICATION
CREATIONISTIC CREDITABILITY CRIMINALISING CRIMINALITIES CRIMINALIZING
CRITICALITIES CULPABILITIES CULTIVABILITY CUTINISATIONS CUTINIZATIONS
CYCLICALITIES DAMNIFICATION DANDIFICATION DECEIVABILITY DECRIMINALISE
DECRIMINALIZE DELIRIFACIENT DENSIFICATION DERACIALISING DERACIALIZING
DESPICABILITY DIACHRONISTIC DIACRITICALLY DIAGNOSTICIAN DIALECTICIANS
DIALECTICISMS DIALOGISTICAL DIATOMICITIES DIGNIFICATION DIJUDICATIONS
DILUCIDATIONS DIORISTICALLY DISCIPLINABLE DISCIPLINANTS DISCRIMINABLE
DISCRIMINABLY DISCRIMINANTS DISCRIMINATED DISCRIMINATES DISCRIMINATOR
DISENCHAINING DISINTOXICATE DISINTRICATED DISINTRICATES DISSOCIALISED
DISSOCIALISES DISSOCIALIZED DISSOCIALIZES DISSOCIATIONS DIVARICATIONS
DIVELLICATING DOCTRINAIRISM DOMICILIATING DOMICILIATION DOSIMETRICIAN
DULCIFICATION DUPLICABILITY EDUCABILITIES EROTICISATION EROTICIZATION
EUDAIMONISTIC EUSOCIALITIES FACILITATIONS FAIRNITICKLES FALSIFICATION
FARCICALITIES FELICITATIONS FICTIONALISED FICTIONALISES FICTIONALIZED
FICTIONALIZES FIDEICOMMISSA FINANCIALISTS FORTIFICATION FRACTIONISING
FRACTIONIZING GALLICISATION GALLICIZATION GAMIFICATIONS GASIFICATIONS
GEOPOLITICIAN GERIATRICIANS GILRAVITCHING GLORIFICATION GRANODIORITIC
GRATIFICATION HEMIPARASITIC HIERARCHISING HIERARCHIZING HISPANICISING
HISPANICIZING HISTAMINERGIC HORRIFICATION HUMIFICATIONS HYPOACIDITIES
IATROGENICITY ICONOMATICISM IDIOMATICALLY IDIOMATICNESS IDIOPLASMATIC
IDIOSYNCRATIC IDIOTICALNESS IMAGISTICALLY IMBECILICALLY IMMANENTISTIC
IMMUNIFACIENT IMPECCABILITY IMPERIALISTIC IMPLACABILITY IMPLICATIONAL
IMPLICATIVELY IMPOLITICALLY IMPREDICATIVE INACTIVATIONS INCARDINATING
INCARDINATION INCARNADINING INCENDIARISMS INCERTAINTIES INCINERATIONS
INCLINATIONAL INCLINATORIUM INCOGITANCIES INCRIMINATING INCRIMINATION
INCRIMINATORS INCRIMINATORY INCULPABILITY INDISSOCIABLE INDISSOCIABLY
INDUPLICATION INEDUCABILITY INEFFICACIOUS INFORMATICIAN INFRASPECIFIC
INHABITANCIES INHARMONICITY INIMICALITIES INOCULABILITY INSCRIPTIONAL
INSIGNIFICANT INSOCIABILITY INTERACTIVITY INTERCHAINING INTOXICATIONS
INTRASPECIFIC INTRINSICALLY ITALICISATION ITALICIZATION JELLIFICATION
JOLLIFICATION JUSTICIALISMS JUSTICIARSHIP JUSTIFICATION JUSTIFICATIVE
LICENTIATIONS LIGNIFICATION LINGUISTICIAN LIQUIFACTIONS LITHIFICATION
MACHINABILITY MAGNIFICATION MASCULINISING MASCULINITIES MASCULINIZING
MASSIFICATION MATERIALISTIC MEDIEVALISTIC MELLIFICATION METRIFICATION
MICROCLIMATIC MICROFILARIAE MICROFILARIAL MICROFILARIAS MICROGRANITIC
MICRONISATION MICRONIZATION MINIATURISTIC MINIFICATIONS MISCAPTIONING
MISCLASSIFIED MISCLASSIFIES MODIFICATIONS MOLLIFICATION MORTIFICATION
MUMMIFICATION MUNDIFICATION MUNDIFICATIVE MUNICIPALISED MUNICIPALISES
MUNICIPALISMS MUNICIPALISTS MUNICIPALIZED MUNICIPALIZES MUSICIANLIEST
MUSICIANSHIPS MYSTIFICATION MYTHICISATION MYTHICIZATION NATIONALISTIC
NAZIFICATIONS NICOTINAMIDES NIDIFICATIONS NITRIFICATION NONANTIBIOTIC
NONPOLITICIAN NOTICEABILITY NOTIFICATIONS NULLIFICATION OFFICIALITIES
ORNITHISCHIAN OSSIFICATIONS PACIFICATIONS PACKABILITIES PAEDIATRICIAN
PALIFICATIONS PALMIFICATION PANIFICATIONS PARASITICIDAL PARASITICIDES
PARTICIPATING PARTICIPATION PARTICIPATIVE PARTICIPIALLY PATRISTICISMS
PECCABILITIES PECULIARISING PECULIARITIES PECULIARIZING PEDANTICISING
PEDANTICIZING PEDIATRICIANS PENICILLAMINE PENICILLATION PENICILLINASE
PERICLITATING PERIODICALIST PERTINACITIES PERVICACITIES PESSIMISTICAL
PETRIFICATION PHYSICALISTIC PHYSICALITIES PHYSICALIZING PHYSICIANCIES
PHYSICIANSHIP PIACULARITIES PIANISTICALLY PICTORIALISED PICTORIALISES
PICTORIALISMS PICTORIALISTS PICTORIALIZED PICTORIALIZES PICTURISATION
PICTURIZATION PIETISTICALLY PLACABILITIES PLEBIFICATION POLITICALISED
POLITICALISES POLITICALIZED POLITICALIZES POLLICITATION PONTIFICALITY
PONTIFICATING PONTIFICATION PORNIFICATION PRECIPITATING PRECIPITATION
PRECIPITATIVE PRECISIANISMS PRECISIANISTS PREDICABILITY PRINCIPALSHIP
PROBABILISTIC PROLIFICACIES PROLIFICATION PROVINCIALISE PROVINCIALISM
PROVINCIALIST PROVINCIALITY PROVINCIALIZE PURIFICATIONS PUTRIFICATION
QUADRICIPITAL QUALIFICATION QUALIFICATIVE QUASIPERIODIC RADIOACTIVITY
RADIOBIOLOGIC RADIOISOTOPIC RADIOPACITIES RAMIFICATIONS RATIFICATIONS
RATIOCINATING RATIOCINATION RATIOCINATIVE RATIONALISTIC REACQUISITION
RECEIVABILITY RECITATIONIST RECRIMINATING RECRIMINATION RECRIMINATIVE
RECTIFICATION REGIONALISTIC REPLICABILITY RESOCIALISING RESOCIALIZING
REUNIFICATION REVINDICATING REVINDICATION ROMANTICISING ROMANTICIZING
SACRIFICIALLY SALIFICATIONS SCALABILITIES SCARIFICATION SCHISMATISING
SCHISMATIZING SCINTIGRAPHIC SCINTILLATING SCINTILLATION SCINTILLISCAN
SCORIFICATION SEMEIOTICIANS SEMIEMPIRICAL SEMIOFFICIALS SEMIPARASITIC
SEMIPOLITICAL SIGNIFICANCES SIGNIFICANTLY SIGNIFICATION SIGNIFICATIVE
SIGNIFICATORS SIGNIFICATORY SIMPLIFICATOR SOCIABILITIES SOCIALISATION
SOCIALIZATION SOLICITATIONS SPECIFICATING SPECIFICATION SPECIFICATIVE
SPIFFLICATING SPIFFLICATION SPIFLICATIONS STATISTICIANS SUBINDICATING
SUBINDICATION SUBINDICATIVE SYLLABICITIES SYNDICALISTIC TACITURNITIES
TARIFFICATION TESTIFICATION THEATRICISING THEATRICIZING THURIFICATION
TRIPLICATIONS TRITHEISTICAL TROPICALISING TROPICALITIES TROPICALIZING
TYPIFICATIONS UGLIFICATIONS UMBILICATIONS UNSOCIABILITY UNSOCIALITIES
VATICINATIONS VERBIFICATION VERIFICATIONS VERSIFICATION VERTICALITIES
VICTIMISATION VICTIMIZATION VILIFICATIONS VINDICABILITY VINDICATORILY
VINIFICATIONS VITRIFACTIONS VITRIFICATION VIVIFICATIONS VIVISECTIONAL
VOLCANICITIES VULCANICITIES YUPPIFICATION ZINCIFICATION ZINKIFICATION
ZOMBIFICATION