There are 946 thirteen-letter words containing A, G, 2I and N, https://www.bestwordlist.com/c/a/5/13letterwordswithagiin.htm
ABIOGENICALLY ABORIGINALISM ABORIGINALITY ACCESSORISING ACCESSORIZING
ACCLIMATISING ACCLIMATIZING ACCOMPLISHING ACHROMATISING ACHROMATIZING
ACQUIESCINGLY ACQUITTANCING ACTINOBIOLOGY ADMINISTERING ADMONISHINGLY
AFFRANCHISING AFFRIGHTENING AGGIORNAMENTI AGGLUTINATING AGGLUTINATION
AGGLUTINATIVE AGONISTICALLY AIRFREIGHTING ALLERGENICITY ALPHABETISING
ALPHABETIZING AMMUNITIONING ANASTIGMATISM ANESTHETISING ANESTHETIZING
ANGIOGRAPHIES ANGIOPLASTIES ANGLICISATION ANGLICIZATION ANIMADVERTING
ANTHOLOGISING ANTHOLOGIZING ANTIALIASINGS ANTIBOURGEOIS ANTICIGARETTE
ANTIFOREIGNER ANTIGENICALLY ANTIGLOBULINS ANTIGRAVITIES ANTIGUERRILLA
ANTIHIJACKING ANTILITTERING ANTILOGARITHM ANTIRELIGIONS ANTIRELIGIOUS
ANTISMUGGLING ANYTHINGARIAN APOTHEOSISING APOTHEOSIZING APPROPINQUING
APPROPRIATING APPROXIMATING ARCHIPELAGIAN ARPEGGIATIONS ARTERIALISING
ARTERIALIZING ASPHETERISING ASPHETERIZING ASSASSINATING ASSIGNABILITY
ASTONISHINGLY ASTRINGENCIES ASTRONOMISING ASTRONOMIZING AUCTIONEERING
BABINGTONITES BACKFLIPPINGS BACKSTITCHING BENEFICIATING BIGNONIACEOUS
BILINGUALISMS BILLINGSGATES BIOGRAPHISING BIOGRAPHIZING BIRDWATCHINGS
BLACKBIRDINGS BLACKLISTINGS BLACKSMITHING BOARDSAILINGS BOATBUILDINGS
BOILERMAKINGS BOILERPLATING BOUGAINVILIAS BOUGAINVILLEA BRAINSTORMING
BRAINWASHINGS BREADWINNINGS CABINETMAKING CALENDARISING CALENDARIZING
CANISTERISING CANISTERIZING CANNIBALISING CANNIBALIZING CANTILEVERING
CAPTIVATINGLY CARCINOLOGIES CARCINOLOGIST CARTILAGINOUS CATALOGUISING
CATALOGUIZING CATHETERISING CATHETERIZING CATHOLICISING CATHOLICIZING
CERTIFICATING CHANGEABILITY CHARIOTEERING CHILDBEARINGS CIRCULARISING
CIRCULARIZING CIVILIANISING CIVILIANIZING CLICKJACKINGS CLIFFHANGINGS
CLINODIAGONAL COACHBUILDING COCULTIVATING COGNOMINATING COGNOMINATION
COLLIESHANGIE COLONIALISING COLONIALIZING COMMISERATING COMMUNALISING
COMMUNALIZING COMMUNICATING COMPACTIFYING COMPAGINATING COMPAGINATION
COMPASSIONING COMPLAININGLY CONCERTINAING CONFIGURATING CONFIGURATION
CONFIGURATIVE CONJUGALITIES CONSANGUINITY CONSIGNATIONS CONSOLIDATING
CONTAGIONISTS CONTAMINATING CONTIGNATIONS CONTRADICTING CORPORATISING
CORPORATIZING COSIGNATORIES CRANIOGNOMIES CRANIOLOGICAL CRANIOLOGISTS
CREDENTIALING CRIMINALISING CRIMINALIZING CRYSTALLISING CRYSTALLIZING
CYTODIAGNOSIS DEATTRIBUTING DECARBONISING DECARBONIZING DECARBURISING
DECARBURIZING DECARTELISING DECARTELIZING DECASUALISING DECASUALIZING
DECLASSIFYING DECORTICATING DECRASSIFYING DECREPITATING DEDRAMATISING
DEDRAMATIZING DEDUPLICATING DEFEUDALISING DEFEUDALIZING DEFIBRINATING
DEFORMALISING DEFORMALIZING DEGLACIATIONS DEGLAMORISING DEGLAMORIZING
DEGLUTINATING DEGLUTINATION DEMAGNETISING DEMAGNETIZING DEMOCRATISING
DEMOCRATIZING DEMUTUALISING DEMUTUALIZING DEMYELINATING DENTILINGUALS
DEPAUPERISING DEPAUPERIZING DERACIALISING DERACIALIZING DESACRALISING
DESACRALIZING DESANCTIFYING DESEXUALISING DESEXUALIZING DESTABILISING
DESTABILIZING DETERIORATING DETERMINATING DETRIBALISING DETRIBALIZING
DIAGNOSTICIAN DIAGONALISING DIAGONALIZING DIAMAGNETISMS DIGITISATIONS
DIGITIZATIONS DIGLADIATIONS DIGNIFICATION DIGRESSIONARY DILLYDALLYING
DIPLOMATISING DIPLOMATIZING DISANNULLINGS DISAPPOINTING DISASSEMBLING
DISCANDERINGS DISENCHAINING DISENCHANTING DISENTANGLING DISENTRAILING
DISENTRAINING DISENTRANCING DISENTRAYLING DISFIGURATION DISGARNISHING
DISGARRISONED DISGAVELLINGS DISGRADATIONS DISGREGATIONS DISHEARTENING
DISINTEGRABLE DISINTEGRATED DISINTEGRATES DISINTEGRATOR DISINVIGORATE
DISOBLIGATION DISORGANISERS DISORGANISING DISORGANIZERS DISORGANIZING
DISPARAGINGLY DISPLEASINGLY DISPLEASURING DISPRAISINGLY DISQUALIFYING
DISSATISFYING DISSEMINATING DISSIMILATING DISSIMULATING DISTRACTINGLY
DIVELLICATING DOGMATISATION DOGMATIZATION DOMESTICATING DOMICILIATING
EFFIGURATIONS EMARGINATIONS EMBLEMATISING EMBLEMATIZING EMIGRATIONIST
ENCARNALISING ENCARNALIZING ENERGISATIONS ENERGIZATIONS ENFRANCHISING
ENGARRISONING ENIGMATICALLY ENTERTAININGS EQUIBALANCING EQUILIBRATING
ETHEREALISING ETHEREALIZING EUTHANATISING EUTHANATIZING EVANGELIARIES
EVANGELIARION EVANGELIARIUM EVANGELICISMS EVENTUALISING EVENTUALIZING
EXCOGITATIONS EXCORTICATING EXPROPRIATING EXTERMINATING EXTERNALISING
EXTERNALIZING EXTINGUISHANT FAMILIARISING FAMILIARIZING FASCINATINGLY
FAULTFINDINGS FERRIMAGNETIC FIANCHETTOING FIBERGLASSING FIBREGLASSING
FOREORDAINING FORMULARISING FORMULARIZING FRACTIONATING FRACTIONISING
FRACTIONIZING FRAGMENTISING FRAGMENTIZING FUNCTIONATING GALLICISATION
GALLICIZATION GALRAVITCHING GALVANISATION GALVANIZATION GAMIFICATIONS
GASIFICATIONS GAZILLIONAIRE GEITONOGAMIES GELATINATIONS GENEALOGISING
GENEALOGIZING GENERALISSIMO GENERATIONISM GENICULATIONS GENITOURINARY
GEODYNAMICIST GEOMETRICIANS GEOPOLITICIAN GERIATRICIANS GERMANISATION
GERMANIZATION GERMINABILITY GERONTOPHILIA GESTICULATING GESTICULATION
GHETTOISATION GHETTOIZATION GIFTWRAPPINGS GIGANTOLOGIES GIGANTOMACHIA
GILRAVITCHING GLAIKITNESSES GLAMORISATION GLAMORIZATION GLOBALISATION
GLOBALIZATION GLORIFICATION GLYCERINATING GONIOMETRICAL GORMANDISINGS
GORMANDIZINGS GOURMANDISING GOURMANDIZING GOVERNABILITY GRAMINICOLOUS
GRAMINIVOROUS GRAMINOLOGIES GRANDIOSITIES GRANITISATION GRANITIZATION
GRANODIORITES GRANODIORITIC GRANULARITIES GRATICULATION GRATIFICATION
GRAVITATIONAL GREGARIANISMS GROUNDBAITING GUANETHIDINES GUARDIANSHIPS
GUESSTIMATING GUTTURALISING GUTTURALIZING HAIRDRESSINGS HAIRSPLITTING
HALLUCINATING HANGABILITIES HARUSPICATING HELIOGRAPHING HEMAGGLUTININ
HEXAMETRISING HEXAMETRIZING HIERARCHISING HIERARCHIZING HIGHFALUTINGS
HISPANICISING HISPANICIZING HISTAMINERGIC HORRIPILATING HOSPITALISING
HOSPITALIZING HUMILIATINGLY HYDRAULICKING HYPERVIGILANT HYPOSTASISING
HYPOSTASIZING HYPOSTATISING HYPOSTATIZING IATROGENICITY ICHNOGRAPHIES
ICONOGRAPHIES ILLOGICALNESS IMAGINARINESS IMAGINATIONAL IMAGINATIVELY
IMMIGRATIONAL IMMORTALISING IMMORTALIZING IMMUNOLOGICAL IMPENETRATING
IMPERIALISING IMPERIALIZING IMPERSONATING IMPIGNORATING IMPIGNORATION
IMPOSTUMATING IMPREGNATIONS IMPROPRIATING IMPROVISATING INAUGURATIONS
INCAPSULATING INCARCERATING INCARDINATING INCARNADINING INCOGITANCIES
INCOGNISANCES INCOGNIZANCES INCORPORATING INCRIMINATING INDEFATIGABLE
INDEFATIGABLY INDIVIDUATING INEGALITARIAN INELABORATING INFANTILISING
INFANTILIZING INFORMATISING INFORMATIZING INFURIATINGLY INGEMINATIONS
INGENERATIONS INGRAFTATIONS INGRAINEDNESS INGRATIATIONS INGURGITATING
INGURGITATION INORGANICALLY INSIGNIFICANT INSINUATINGLY INSTAGRAMMING
INSTANTIATING INSTIGATINGLY INTANGIBILITY INTEGRABILITY INTEGRALITIES
INTERAGENCIES INTERCALATING INTERCHAINING INTERCHANGING INTERDIGITATE
INTERGALACTIC INTERGLACIALS INTERGRADIENT INTERGRAFTING INTERLAYERING
INTERMARGINAL INTERMARRIAGE INTERMARRYING INTERNALISING INTERNALIZING
INTERPLANTING INTERPLEADING INTERPOLATING INTERREGIONAL INTERRELATING
INTERROGATING INTERROGATION INTERROGATIVE INTERTANGLING INTERTILLAGES
INTRAGALACTIC INTRANSIGEANT INTRANSIGENCE INTRANSIGENCY INTRANSIGENTS
INTURBIDATING INVAGINATIONS INVESTIGATING INVESTIGATION INVESTIGATIVE
INVESTIGATORS INVESTIGATORY INVIGILATIONS INVIGORATIONS IRREFRANGIBLE
IRREFRANGIBLY ISOAGGLUTININ JARGONISATION JARGONIZATION JICKAJOGGINGS
KITEBOARDINGS LANGUISHINGLY LEGALISATIONS LEGALIZATIONS LEGITIMATIONS
LIGNIFICATION LINGUISTICIAN LITHOGRAPHING LIVESTREAMING LONGANIMITIES
MACHICOLATING MAGNANIMITIES MAGNETISATION MAGNETIZATION MAGNIFICATION
MAGNIFICENCES MAGNIFICENTLY MAGNITUDINOUS MAINSTREAMING MAINSTREETING
MAINTENANCING MALIMPRINTING MANAGEABILITY MANAGERIALISM MANAGERIALIST
MANRIKIGUSARI MANSPLAININGS MARGINALISING MARGINALITIES MARGINALIZING
MARISCHALLING MARLINGSPIKES MASCULINISING MASCULINIZING MASTERMINDING
MATERIALISING MATERIALIZING MATHEMATISING MATHEMATIZING MATRICULATING
MEDICAMENTING MEMORIALISING MEMORIALIZING MERCHANDISING MERCHANDIZING
METACOGNITION METASTASISING METASTASIZING METATHESISING METATHESIZING
MICROCRACKING MICROGRANITES MICROGRANITIC MICROGRAPHING MICROMANAGING
MICROORGANISM MIGRATIONISTS MIMEOGRAPHING MINERALOGICAL MINERALOGISED
MINERALOGISES MINERALOGISTS MINERALOGIZED MINERALOGIZES MINIATURISING
MINIATURIZING MISADDRESSING MISALIGNMENTS MISALLOCATING MISASSEMBLING
MISCAPTIONING MISCATALOGING MISCEGENATING MISCEGENATION MISCHANNELING
MISDIAGNOSING MISENTREATING MISESTIMATING MISEVALUATING MISPERSUADING
MISPROGRAMING MONOAMINERGIC MORIGERATIONS MULTIAGENCIES MULTIREGIONAL
MULTITASKINGS MULTITRACKING NAPHTHALISING NAPHTHALIZING NATIONALISING
NATIONALIZING NECESSITATING NEGOTIABILITY NEGOTIATRICES NEGOTIATRIXES
NEOLOGISTICAL NEOPAGANISING NEOPAGANIZING NEUROIMAGINGS NIGGARDLINESS
NIGHTMARISHLY NITROGELATINE NITROGELATINS NOCTIVAGATION NONBIOLOGICAL
NONDIAPAUSING NONFIGURATIVE NONIMMIGRANTS NONINCREASING NONIRRITATING
NONPRACTICING NONPRACTISING NOTHINGARIANS OBJECTIVATING OCTINGENARIES
OPPIGNERATING OPPIGNERATION OPPIGNORATING OPPIGNORATION ORGANISATIONS
ORGANIZATIONS ORIENTALISING ORIENTALIZING ORIGINALITIES ORIGINATIVELY
OUTBARGAINING OUTDISTANCING OUTORGANISING OUTORGANIZING OUTPASSIONING
OUTVILLAINING OVERACHIEVING OVERDEVIATING OVERDIAGNOSIS OVERFATIGUING
OVERINFLATING OVERLAVISHING OVERSTRAINING PAGANISATIONS PAGANIZATIONS
PAINSTAKINGLY PAINTBALLINGS PALINGENESIAS PALINGENESIES PALINGENESIST
PARALLELISING PARALLELIZING PARAMETRISING PARAMETRIZING PARFOCALISING
PARFOCALIZING PARLIAMENTING PARTICIPATING PATHOGENICITY PATHOLOGISING
PATHOLOGIZING PATRILINEAGES PATRONISINGLY PATRONIZINGLY PECULIARISING
PECULIARIZING PEDANTICISING PEDANTICIZING PENINSULATING PEREGRINATING
PEREGRINATION PERICLITATING PERSONALISING PERSONALIZING PHAGOCYTISING
PHAGOCYTIZING PHARYNGITIDES PHARYNGITISES PHILANDERINGS PHOSPHATISING
PHOSPHATIZING PHYSICALIZING PIDGINISATION PIDGINIZATION PIEZOMAGNETIC
PIGMENTATIONS PLANIGRAPHIES PLAYWRIGHTING PLEBEIANISING PLEBEIANIZING
PONTIFICATING PREACHIFYINGS PREAPPOINTING PRECAUTIONING PRECIPITATING
PREDOMINATING PREFIGURATING PREFIGURATION PREFINANCINGS PREGANGLIONIC
PREINSTALLING PREJUDICATING PREMEDICATING PREMEDITATING PREMIGRATIONS
PRENOMINATING PREQUALIFYING PRESIGNALLING PREVARICATING PRIMOGENITARY
PRIVATEERINGS PRODIGALISING PRODIGALIZING PROGENITORIAL PROLIFERATING
PRUSSIANISING PRUSSIANIZING PSEUDIMAGINES PUTANGITANGIS QUADRIGEMINAL
QUADRILINGUAL QUADRISECTING RADIOGRAPHING RADIOLABELING RANGEFINDINGS
RATIOCINATING RATIONALISING RATIONALIZING REACCLIMATING REACCREDITING
REACQUAINTING READVERTISING READVERTIZING REATTRIBUTING REAUTHORISING
REAUTHORIZING RECALIBRATING RECIPROCATING RECIRCULATING RECLASSIFYING
RECRIMINATING RECULTIVATING REDUPLICATING REEMPHASISING REEMPHASIZING
REFOCILLATING REFRIGERATING REFRIGERATION REGIMENTATION REGIONALISING
REGIONALISTIC REGIONALIZING REGISTRATIONS REGURGITATING REGURGITATION
REHARMONIZING REINCARNATING REINNERVATING REINOCULATING REINTEGRATING
REINTEGRATION REINTEGRATIVE REINVESTIGATE REINVIGORATED REINVIGORATES
REINVIGORATOR RELIGIONARIES RELUBRICATING RENEGOTIATING RENEGOTIATION
RENORMALISING RENORMALIZING REORIENTATING REPAGINATIONS REPRIVATISING
REPRIVATIZING RESOCIALISING RESOCIALIZING RESTABILISING RESTABILIZING
RESTIMULATING RESUSCITATING REVACCINATING REVENDICATING REVICTUALLING
REVINDICATING REVISUALIZING RHINORRHAGIAS ROADBUILDINGS ROMANTICISING
ROMANTICIZING RUGGEDISATION RUGGEDIZATION SACCHARIFYING SAILBOARDINGS
SALPINGITISES SANCTIFYINGLY SANCTUARISING SANCTUARIZING SANDPAINTINGS
SAPROGENICITY SATELLITISING SATELLITIZING SCHISMATISING SCHISMATIZING
SCINTIGRAPHIC SCINTILLATING SCRIMSHANKING SERODIAGNOSIS SHAPESHIFTING
SIGNALISATION SIGNALIZATION SIGNIFICANCES SIGNIFICANTLY SIGNIFICATION
SIGNIFICATIVE SIGNIFICATORS SIGNIFICATORY SINGULARISING SINGULARITIES
SINGULARIZING SIPHONOGAMIES SKRIMSHANKING SLIPSTREAMING SLUGGARDISING
SLUGGARDIZING SPECIFICATING SPIFFLICATING STAIRSTEPPING STANDARDISING
STANDARDIZING STAYSTITCHING STICKHANDLING STICKYBEAKING STIMULATINGLY
STIPENDIATING STRAIGHTENING STREAMLININGS STUDDINGSAILS SUBINDICATING
SUBIRRIGATING SUBIRRIGATION SUBORDINATING SUBURBANISING SUBURBANIZING
SUBVOCALISING SUBVOCALIZING SUFFUMIGATING SUFFUMIGATION SUPERPRAISING
SWITCHBACKING SYLLABICATING SYLLOGISATION SYLLOGIZATION SYRINGOMYELIA
SYSTEMATISING SYSTEMATIZING TANGENTIALITY TANGIBILITIES TANTALISINGLY
TANTALIZINGLY TAUTOLOGISING TAUTOLOGIZING TAXIDERMISING TAXIDERMIZING
TELEPATHISING TELEPATHIZING TEMPORALISING TEMPORALIZING TENOVAGINITIS
THANKSGIVINGS THEATRICISING THEATRICIZING TITILLATINGLY TRAILBLAZINGS
TRAINSPOTTING TRAMPOLININGS TRANQUILISING TRANQUILIZING TRANSFIGURING
TRANSHIPPINGS TRANSITIONING TRANSPIERCING TRANSSHIPPING TRIANGULARITY
TRIANGULATING TRIANGULATION TRILINGUALISM TROPICALISING TROPICALIZING
UGLIFICATIONS UNACQUAINTING UNAPOLOGISING UNAPOLOGIZING UNBARRICADING
UNCOMPLAINING UNDERDRAINING UNDERPAINTING UNDERPRAISING UNDEVIATINGLY
UNDISGUISABLE UNDISTRACTING UNFAILINGNESS UNFEUDALISING UNFEUDALIZING
UNIDEOLOGICAL UNILINGUALISM UNILINGUALIST UNIMAGINATIVE UNMECHANISING
UNMECHANIZING UNMITIGATEDLY UNORIGINALITY UNSANCTIFYING UNSTIGMATISED
UNSTIGMATIZED UNVULGARISING UNVULGARIZING UNWITHDRAWING USTILAGINEOUS
VACILLATINGLY VAGABONDISING VAGABONDIZING VAGINECTOMIES VASCULARISING
VASCULARIZING VASECTOMISING VASECTOMIZING VEGETARIANISM VERBIGERATING
VERBIGERATION VERMICULATING VILLAGISATION VILLAGIZATION VULGARISATION
VULGARIZATION WAINSCOTTINGS WAISTCOATINGS WALKINGSTICKS WASHINGTONIAS
WELLINGTONIAS WHILLYWHAWING WHITEWASHINGS WINDBAGGERIES XENODIAGNOSIS
ZINCOGRAPHIES