There are 925 thirteen-letter words containing A, 3I and N, https://www.bestwordlist.com/c/a/5/13letterwordswithaiiin.htm
ABOLITIONISMS ABOLITIONISTS ABORIGINALISM ABORIGINALITY ACCLIMATISING
ACCLIMATIZING ACETIFICATION ACIDIFICATION ACQUISITIONAL ACTINOBACILLI
ADDITIONALITY ADMINISTERING AERIFICATIONS AIRFREIGHTING ALUMINOSITIES
AMENABILITIES AMINOACIDURIA AMITRIPTYLINE AMMUNITIONING AMPLIFICATION
ANALYTICITIES ANGLICISATION ANGLICIZATION ANIMALISATION ANIMALIZATION
ANNIHILATIONS ANNUITISATION ANNUITIZATION ANTERIORITIES ANTIALIASINGS
ANTIARTHRITIC ANTIARTHRITIS ANTIBALLISTIC ANTICHRISTIAN ANTICIPATIONS
ANTICLIMACTIC ANTICLINORIUM ANTICOLLISION ANTIDIABETICS ANTIDIURETICS
ANTIEPILEPTIC ANTIFEMINISMS ANTIFEMINISTS ANTIFERTILITY ANTIGRAVITIES
ANTIHIJACKING ANTIHISTAMINE ANTILITTERING ANTIMICROBIAL ANTINEPHRITIC
ANTINOMIANISM ANTIPARASITIC ANTIPERIODICS ANTIPESTICIDE ANTIPOLITICAL
ANTIPRURITICS ANTIQUITARIAN ANTIRACHITICS ANTIRADIATION ANTIRELIGIONS
ANTIRELIGIOUS ANTIRITUALISM ANTISEPTICISE ANTISEPTICISM ANTISEPTICIZE
ANTISOCIALISM ANTISOCIALIST ANTISOCIALITY ARABICISATION ARABICIZATION
ARACHNOIDITIS ARITHMETICIAN ARTERIALISING ARTERIALIZING ASSIBILATIONS
ASSIGNABILITY ASSIMILATIONS ATTAINABILITY ATTITUDINISED ATTITUDINISER
ATTITUDINISES ATTITUDINIZED ATTITUDINIZER ATTITUDINIZES BANKABILITIES
BASIFICATIONS BEATIFICATION BENEFICIARIES BENEFICIATING BENEFICIATION
BIBLIOMANCIES BIBLIOMANIACS BICONCAVITIES BICONDITIONAL BIDIRECTIONAL
BILINGUALISMS BIMILLENARIES BIMILLENNIALS BIOGRAPHISING BIOGRAPHIZING
BIOINFORMATIC BIOMETRICIANS BIPARTISANISM BOUGAINVILIAS BRILLIANTINED
BRILLIANTINES CALCIFICATION CANISTERISING CANISTERIZING CANNIBALISING
CANNIBALISTIC CANNIBALIZING CAPRIFICATION CARDINALITIAL CARDINALITIES
CARNIFICATION CATHOLICISING CATHOLICIZING CERTIFICATING CERTIFICATION
CHIEFTAINCIES CHIEFTAINRIES CHIEFTAINSHIP CHYLIFICATION CHYMIFICATION
CICATRISATION CICATRIZATION CIRCULARISING CIRCULARIZING CITIFICATIONS
CITYFICATIONS CIVILIANISING CIVILIANIZING CIVILISATIONS CIVILIZATIONS
CLARIFICATION CLINOPINACOID CLINOPINAKOID CLIOMETRICIAN COALIFICATION
COALITIONISMS COALITIONISTS COCAINISATION COCAINIZATION CODIFICATIONS
COLINEARITIES COLONIALISING COLONIALISTIC COLONIALIZING COMBINABILITY
CONCILIATIONS CONSIMILARITY CONVIVIALISTS CORINTHIANISE CORINTHIANIZE
CORNIFICATION CREATIONISTIC CRIMINALISING CRIMINALITIES CRIMINALIZING
CUTINISATIONS CUTINIZATIONS DAMNABILITIES DAMNIFICATION DANDIFICATION
DEAMINISATION DEAMINIZATION DEBILITATIONS DECRIMINALISE DECRIMINALIZE
DEFIBRINATING DEFIBRINATION DEIONISATIONS DEIONIZATIONS DELIMITATIONS
DELIRIFACIENT DENIABILITIES DENSIFICATION DEOXIDISATION DEOXIDIZATION
DERACIALISING DERACIALIZING DERIVATIONIST DESTABILISING DESTABILIZING
DETRIBALISING DETRIBALIZING DEVIATIONISMS DEVIATIONISTS DIACHRONISTIC
DIAGNOSTICIAN DIAGONALISING DIAGONALIZING DIALECTICIANS DIAPHANEITIES
DIAZOTISATION DIAZOTIZATION DIESELISATION DIESELIZATION DIGITISATIONS
DIGITIZATIONS DIGLADIATIONS DIGNIFICATION DIJUDICATIONS DILAPIDATIONS
DILUCIDATIONS DIMERISATIONS DIMERIZATIONS DIPLOMATISING DIPLOMATIZING
DISAPPOINTING DISCIPLINABLE DISCIPLINANTS DISCRIMINABLE DISCRIMINABLY
DISCRIMINANTS DISCRIMINATED DISCRIMINATES DISCRIMINATOR DISENCHAINING
DISENTRAILING DISENTRAINING DISESTIMATION DISFIGURATION DISGARNISHING
DISILLUMINATE DISINFLATIONS DISINTOXICATE DISINTRICATED DISINTRICATES
DISINVIGORATE DISOBLIGATION DISORGANISING DISORGANIZING DISPOSITIONAL
DISPRAISINGLY DISQUALIFYING DISQUANTITIED DISQUANTITIES DISSATISFYING
DISSEMINATING DISSEMINATION DISSEMINATIVE DISSIMILATING DISSIMILATION
DISSIMULATING DISSIMULATION DISSOCIATIONS DISTILLATIONS DITRANSITIVES
DIVARICATIONS DIVELLICATING DIVINISATIONS DIVINIZATIONS DOCTRINAIRISM
DOMICILIATING DOMICILIATION DOSIMETRICIAN DULCIFICATION ELIMINABILITY
ELIMINATIVISM EMIGRATIONIST EOSINOPHILIAS EPIDOTISATION EPIDOTIZATION
EPITOMISATION EPITOMIZATION EQUILIBRATING EQUILIBRATION EQUIPARTITION
EROTICISATION EROTICIZATION EUDAIMONISTIC EXAMINABILITY EXPANSIBILITY
EXPANSIVITIES FACILITATIONS FAIRNITICKLES FALSIFICATION FAMILIARISING
FAMILIARIZING FELICITATIONS FEMINISATIONS FEMINIZATIONS FERTILISATION
FERTILIZATION FETISHISATION FETISHIZATION FIBERISATIONS FIBERIZATIONS
FIBRILLATIONS FICTIONALISED FICTIONALISES FICTIONALIZED FICTIONALIZES
FINALISATIONS FINALIZATIONS FINANCIALISTS FLUIDISATIONS FLUIDIZATIONS
FORTIFICATION FOSSILISATION FOSSILIZATION FRACTIONISING FRACTIONIZING
FRUITARIANISM FUSTILLIRIANS FUTILITARIANS GALLICISATION GALLICIZATION
GAMIFICATIONS GASIFICATIONS GAZILLIONAIRE GEOPOLITICIAN GERIATRICIANS
GERMINABILITY GILRAVITCHING GLORIFICATION GRANDIOSITIES GRANITISATION
GRANITIZATION GRANODIORITIC GRATIFICATION HABILITATIONS HAIRSPLITTING
HANGABILITIES HELMINTHIASIS HIBERNISATION HIBERNIZATION HIERARCHISING
HIERARCHIZING HISPANICISING HISPANICIZING HISPANIOLISED HISPANIOLISES
HISPANIOLIZED HISPANIOLIZES HISTAMINERGIC HOMINISATIONS HOMINIZATIONS
HORRIFICATION HORRIPILATING HORRIPILATION HOSPITALISING HOSPITALIZING
HUMIFICATIONS HUMILIATINGLY HYALINISATION HYALINIZATION HYBRIDISATION
HYBRIDIZATION IATROGENICITY ICONOMATICISM IDEALISATIONS IDEALIZATIONS
IDIOMATICNESS IDIOSYNCRATIC IDIOTICALNESS ILLIMITATIONS ILLUMINATIONS
IMAGINARINESS IMAGINATIONAL IMAGINATIVELY IMITATIVENESS IMMANENTISTIC
IMMIGRATIONAL IMMISERATIONS IMMORTALISING IMMORTALIZING IMMUNIFACIENT
IMMUNISATIONS IMMUNIZATIONS IMPARIPINNATE IMPERIALISING IMPERIALIZING
IMPIGNORATING IMPIGNORATION IMPLICATIONAL IMPROPRIATING IMPROPRIATION
IMPROVISATING IMPROVISATION INACTIVATIONS INCARDINATING INCARDINATION
INCARNADINING INCENDIARISMS INCERTAINTIES INCINERATIONS INCLINATIONAL
INCLINATORIUM INCOGITANCIES INCRIMINATING INCRIMINATION INCRIMINATORS
INCRIMINATORY INCULPABILITY INDISSOCIABLE INDISSOCIABLY INDIVIDUALISE
INDIVIDUALISM INDIVIDUALIST INDIVIDUALITY INDIVIDUALIZE INDIVIDUATING
INDIVIDUATION INDIVIDUATORS INDUPLICATION INDUSTRIALISE INDUSTRIALISM
INDUSTRIALIST INDUSTRIALIZE INEDUCABILITY INEFFICACIOUS INEGALITARIAN
INEVITABILITY INEXORABILITY INFALLIBILISM INFALLIBILIST INFALLIBILITY
INFANTILISING INFANTILITIES INFANTILIZING INFEASIBILITY INFERNALITIES
INFIBULATIONS INFILTRATIONS INFINITESIMAL INFINITIVALLY INFLATIONISMS
INFLATIONISTS INFORMALITIES INFORMATICIAN INFORMATISING INFORMATIZING
INFRAPOSITION INFRASPECIFIC INFURIATINGLY INGEMINATIONS INGRATIATIONS
INGURGITATING INGURGITATION INHABITANCIES INHABITATIONS INHARMONICITY
INHOSPITALITY INIMICALITIES INIMITABILITY INITIALNESSES INITIATRESSES
INNOVATIONIST INOCULABILITY INOPERABILITY INORDINATIONS INQUISITIONAL
INQUISITORIAL INSALIVATIONS INSALUBRITIES INSANITATIONS INSATIABILITY
INSCRIPTIONAL INSEMINATIONS INSIGNIFICANT INSINUATINGLY INSOCIABILITY
INSOLVABILITY INSPIRATIONAL INSPISSATIONS INSTABILITIES INSTANTIATING
INSTANTIATION INSTIGATINGLY INSTILLATIONS INSTITUTIONAL INTANGIBILITY
INTEGRABILITY INTEGRALITIES INTERACTIVITY INTERCHAINING INTERDIGITATE
INTERFAMILIAL INTERNALISING INTERNALITIES INTERNALIZING INTERSTITIALS
INTIMIDATIONS INTOXICATIONS INTRANSITIVES INTRASPECIFIC INTRINSICALLY
INTUITIONALLY INTURBIDATING INVAGINATIONS INVALIDATIONS INVARIABILITY
INVESTIGATING INVESTIGATION INVESTIGATIVE INVIABILITIES INVIGILATIONS
INVIGORATIONS INVIOLABILITY INVITATIONALS IRRATIONALISE IRRATIONALISM
IRRATIONALIST IRRATIONALITY IRRATIONALIZE ISOAGGLUTININ ISOANTIBODIES
ISOLATIONISMS ISOLATIONISTS ISOMERISATION ISOMERIZATION ITALICISATION
ITALICIZATION JELLIFICATION JOLLIFICATION JUSTIFICATION KINESIPATHIES
KINESIPATHIST LABIALISATION LABIALIZATION LABYRINTHITIS LATINISATIONS
LATINIZATIONS LEGITIMATIONS LEISHMANIASIS LEISHMANIOSIS LIBERATIONISM
LIBERATIONIST LIBRARIANSHIP LICENTIATIONS LIGNIFICATION LINEARISATION
LINEARIZATION LINGUISTICIAN LIQUIFACTIONS LISTENABILITY LITHIFICATION
LONGANIMITIES LUTEINISATION LUTEINIZATION MACHINABILITY MAGNANIMITIES
MAGNIFICATION MALIMPRINTING MANRIKIGUSARI MARGINALISING MARGINALITIES
MARGINALIZING MASCULINISING MASCULINITIES MASCULINIZING MASSIFICATION
MATERIALISING MATERIALIZING MAXIMISATIONS MAXIMIZATIONS MEDIATISATION
MEDIATIZATION MELLIFICATION MEMORIALISING MEMORIALIZING MERIDIONALITY
METRIFICATION MICROGRANITIC MICRONISATION MICRONIZATION MIGRATIONISTS
MILLENNIALISM MILLENNIALIST MILLENNIANISM MILLENNIARISM MILLIONAIRESS
MILLIONNAIRES MINIATURISING MINIATURISTIC MINIATURIZING MINIFICATIONS
MINIMISATIONS MINIMIZATIONS MINISTERIALLY MINISTRATIONS MISCAPTIONING
MISDIAGNOSING MISESTIMATING MISESTIMATION MISSIONARISED MISSIONARISES
MISSIONARIZED MISSIONARIZES MOBILISATIONS MOBILIZATIONS MODIFICATIONS
MOLLIFICATION MORTIFICATION MULTIVITAMINS MUMMIFICATION MUNDIFICATION
MUNDIFICATIVE MUNICIPALISED MUNICIPALISES MUNICIPALISMS MUNICIPALISTS
MUNICIPALIZED MUNICIPALIZES MUSICIANLIEST MUSICIANSHIPS MYSTIFICATION
MYTHICISATION MYTHICIZATION NATIONALISING NATIONALISTIC NATIONALITIES
NATIONALIZING NAZIFICATIONS NEGOTIABILITY NICOTINAMIDES NIDIFICATIONS
NITRIFICATION NOBILITATIONS NONADDITIVITY NONANTIBIOTIC NONEQUILIBRIA
NONINDIVIDUAL NONIRRITATING NONMILITARIES NONPOLITICIAN NONVALIDITIES
NOTICEABILITY NOTIFICATIONS NOTIONALITIES NULLIFICATION NULLIPARITIES
OBTAINABILITY OPENABILITIES OPTIMISATIONS OPTIMIZATIONS OPTIONALITIES
ORIENTALISING ORIENTALITIES ORIENTALIZING ORIGINALITIES ORIGINATIVELY
ORNITHISCHIAN OSSIFICATIONS OUTVILLAINING OVIPOSITIONAL PACIFICATIONS
PAEDIATRICIAN PALIFICATIONS PALMIFICATION PANIFICATIONS PARTICIPATING
PARTICIPATION PARTITIONISTS PARVANIMITIES PECULIARISING PECULIARIZING
PEDANTICISING PEDANTICIZING PEDIATRICIANS PENICILLAMINE PENICILLATION
PENICILLINASE PERICLITATING PERIODISATION PERIODIZATION PERTINACITIES
PETRIFICATION PHYSICALIZING PHYSICIANCIES PHYSICIANSHIP PIANISSISSIMO
PIANISTICALLY PICTURISATION PICTURIZATION PIDGINISATION PIDGINIZATION
PLATINIRIDIUM PLATINISATION PLATINIZATION PLATITUDINISE PLATITUDINIZE
PLEBEIANISING PLEBEIANIZING PLEBIFICATION POLLICITATION PONTIFICALITY
PONTIFICATING PONTIFICATION PORNIFICATION POSTLIMINIARY PRECIPITATING
PRECIPITATION PRECISIANISMS PRECISIANISTS PRELIMINARIES PRELIMINARILY
PRINCIPALSHIP PRIVATISATION PRIVATIZATION PRODIGALISING PRODIGALIZING
PROLIFICATION PROPITIATIONS PROVINCIALISE PROVINCIALISM PROVINCIALIST
PROVINCIALITY PROVINCIALIZE PRUSSIANISING PRUSSIANIZING PUNISHABILITY
PURIFICATIONS PUSILLANIMITY PUTRIFICATION PYRITHIAMINES QUALIFICATION
RADIALISATION RADIALIZATION RAMIFICATIONS RATIFICATIONS RATIOCINATING
RATIOCINATION RATIOCINATIVE RATIONALISING RATIONALISTIC RATIONALITIES
RATIONALIZING REACQUISITION RECITATIONIST RECRIMINATING RECRIMINATION
RECRIMINATIVE RECTIFICATION REGIONALISING REGIONALISTIC REGIONALIZING
REINITIATIONS RELIGIONARIES RENTABILITIES REPRIVATISING REPRIVATIZING
RESOCIALISING RESOCIALIZING RESTABILISING RESTABILIZING REUNIFICATION
REUTILISATION REUTILIZATION REVINDICATING REVINDICATION REVISITATIONS
REVISUALIZING RINSABILITIES RITUALISATION RITUALIZATION ROMANTICISING
ROMANTICIZING ROUTINISATION ROUTINIZATION SALIFICATIONS SALINISATIONS
SALINIZATIONS SALPINGITISES SANITARIANISM SANITATIONIST SANITISATIONS
SANITIZATIONS SATELLITISING SATELLITIZING SATIRISATIONS SATIRIZATIONS
SATURNINITIES SCARIFICATION SCHISMATISING SCHISMATIZING SCINTIGRAPHIC
SCINTILLATING SCINTILLATION SCINTILLISCAN SCORIFICATION SEDITIONARIES
SEMEIOTICIANS SEMIFINALISTS SENSITISATION SENSITIZATION SERIALISATION
SERIALIZATION SIGNALISATION SIGNALIZATION SIGNIFICANCES SIGNIFICANTLY
SIGNIFICATION SIGNIFICATIVE SIGNIFICATORS SIGNIFICATORY SINGULARISING
SINGULARITIES SINGULARIZING SINTERABILITY SITUATIONISMS SOCIALISATION
SOCIALIZATION SOLICITATIONS SOLIFIDIANISM SORBITISATION SORBITIZATION
SOVIETISATION SOVIETIZATION SPECIFICATING SPECIFICATION SPIFFLICATING
SPIFFLICATION SPIFLICATIONS STABILISATION STABILIZATION STATISTICIANS
STERILISATION STERILIZATION STIPENDIARIES STIPENDIATING SUBDIVISIONAL
SUBINDICATING SUBINDICATION SUBINDICATIVE SUBIRRIGATING SUBIRRIGATION
SUBSIDISATION SUBSIDIZATION SUBTILISATION SUBTILIZATION SULFADIMIDINE
SYNDICALISTIC SYPHILISATION SYPHILIZATION TACITURNITIES TANGIBILITIES
TARIFFICATION TAXIDERMISING TAXIDERMIZING TENOVAGINITIS TERMINABILITY
TESTIFICATION THEATRICISING THEATRICIZING THIORIDAZINES THIOSINAMINES
THURIFICATION TITILLATINGLY TRADITIONISTS TRANQUILISING TRANQUILITIES
TRANQUILIZING TRANSITIONING TRILINGUALISM TRILLIONAIRES TRINOMIALISMS
TRINOMIALISTS TRIPARTITIONS TRIPLICATIONS TRIPUDIATIONS TROPICALISING
TROPICALIZING TYPIFICATIONS UBIQUITARIANS UGLIFICATIONS UMBILICATIONS
UNFAMILIARITY UNILINGUALISM UNILINGUALIST UNIMAGINATIVE UNINTIMIDATED
UNIONISATIONS UNIONIZATIONS UNIPOLARITIES UNITARIANISMS UNMINISTERIAL
UNORIGINALITY UNRELIABILITY UNSOCIABILITY UNSOCIALITIES UNSUITABILITY
UNVITRIFIABLE URALITISATION URALITIZATION VARIATIONISTS VARIOLISATION
VARIOLIZATION VASOINHIBITOR VATICINATIONS VERBIFICATION VERIFICATIONS
VERSIFICATION VICTIMISATION VICTIMIZATION VILIFICATIONS VILLAGISATION
VILLAGIZATION VINDICABILITY VINDICATORILY VINIFICATIONS VIRILISATIONS
VIRILIZATIONS VISIONARINESS VISUALISATION VISUALIZATION VITALISATIONS
VITALIZATIONS VITRIFACTIONS VITRIFICATION VITRIOLATIONS VIVIFICATIONS
VIVISECTIONAL VOLCANICITIES VULCANICITIES WINNABILITIES WINTERISATION
WINTERIZATION YUPPIFICATION ZINCIFICATION ZINKIFICATION ZOMBIFICATION