There are 766 twelve-letter words containing A, G, I, L and O, https://www.bestwordlist.com/c/a/5/12letterwordswithagilo.htm
ABORIGINALLY ABSOLUTISING ABSOLUTIZING ACAROLOGISTS ACROMEGALICS
ACROMEGALIES AEROSOLISING AEROSOLIZING AETIOLOGICAL AETIOLOGISTS
AFFRONTINGLY AGALMATOLITE AGGLUTINOGEN AGNOIOLOGIES AGROCHEMICAL
AGROSTOLOGIC ALCOHOLISING ALCOHOLIZING ALGOLAGNIACS ALGOLAGNISTS
ALLEGORISERS ALLEGORISING ALLEGORIZERS ALLEGORIZING ALLOANTIGENS
ALLOGRAFTING ALPHASORTING AMALGAMATION AMBLYGONITES AMELIORATING
AMELOGENESIS AMYGDALOIDAL ANAGOGICALLY ANALOGICALLY ANDROLOGISTS
ANGELOLOGIES ANGELOLOGIST ANGIOSPERMAL ANGLOMANIACS ANGLOPHILIAS
ANGLOPHOBIAC ANGLOPHOBIAS ANGUILLIFORM ANTHOLOGICAL ANTHOLOGISED
ANTHOLOGISER ANTHOLOGISES ANTHOLOGISTS ANTHOLOGIZED ANTHOLOGIZER
ANTHOLOGIZES ANTICLOTTING ANTIFOULINGS ANTIGLOBULIN ANTIGROPELOS
ANTILEGOMENA ANTIRELIGION APAGOGICALLY APOLOGETICAL APOSTOLISING
APOSTOLIZING ARCHEOLOGIES ARCHEOLOGIST ARCHIPELAGOS ARGILLACEOUS
ARISTOLOGIES ASSOILZIEING ASTACOLOGIES ASTACOLOGIST ASTOUNDINGLY
ASTROBIOLOGY ASTROLOGICAL ASTROLOGISTS ATHEOLOGICAL AUDIOLOGICAL
AUDIOLOGISTS AUTECOLOGIES AUTODIALLING AUTOMOBILING BACTERIOLOGY
BALNEOLOGIES BALNEOLOGIST BATTOLOGICAL BECLAMOURING BEGLAMOURING
BERTILLONAGE BIBLIOGRAPHY BILLBOARDING BIOGENETICAL BIOGRAPHICAL
BIOLOGICALLY BIPOLARISING BIPOLARIZING BLACKTOPPING BLOGJACKINGS
BOARDSAILING BOATBUILDING BOILERMAKING BOUGAINVILIA BRACHYLOGIES
CALIGINOSITY CALLIBOGUSES CAMOUFLAGING CARDIOLOGIES CARDIOLOGIST
CARDIOMEGALY CARDIOPLEGIA CARILLONNING CARPHOLOGIES CARPOLOGICAL
CARPOLOGISTS CARTOLOGICAL CATABOLISING CATABOLIZING CATALOGISING
CATALOGIZING CATALOGUISED CATALOGUISES CATALOGUISTS CATALOGUIZED
CATALOGUIZES CATEGORIALLY CHALAZOGAMIC CHALCOGENIDE CHARBROILING
CHLORIDATING CHLORINATING CHOROLOGICAL CLADOGENESIS CLADOGENETIC
CLAPBOARDING CLEISTOGAMIC CLIMATOLOGIC CLISTOGAMIES CLOISONNAGES
COAGULATIONS COGITATINGLY COGITATIVELY COGNOMINALLY COLLEGIALISM
COLLEGIALITY COLLEGIANERS COLLEGIATELY COLLIGATIONS COLLIQUATING
COLOGARITHMS COLORCASTING COLORWASHING COMMANDINGLY COMPLAININGS
COMPLICATING CONCEALINGLY CONCILIATING CONGELATIONS CONGENERICAL
CONGENIALITY CONGENITALLY CONGLOBATING CONGLOBATION CONGLUTINANT
CONGLUTINATE CONTAGIOUSLY CONVALESCING CORDIALISING CORDIALIZING
CORRIVALLING COSMOGONICAL COSMOLOGICAL COTANGENTIAL CRANIOLOGIES
CRANIOLOGIST CRYOSURGICAL CYCLOGRAPHIC CYCLOPLEGIAS DACTYLIOLOGY
DECOLORATING DEFLAGRATION DEGLACIATION DEGLAMORISED DEGLAMORISES
DEGLAMORIZED DEGLAMORIZES DEGRINGOLADE DELOCALISING DELOCALIZING
DEMODULATING DEMORALISING DEMORALIZING DEOPPILATING DEPOLARISING
DEPOLARIZING DEPOPULATING DEREGULATION DERMATOLOGIC DEROGATIVELY
DEROGATORILY DESOLATINGLY DEVALORISING DEVALORIZING DEVOCALISING
DEVOCALIZING DIAGNOSEABLE DIAGNOSTICAL DIAGONALISED DIAGONALISES
DIAGONALIZED DIAGONALIZES DIALECTOLOGY DIALOGICALLY DIGLADIATION
DIGLADIATORS DIGRESSIONAL DISANALOGIES DISANALOGOUS DISHALLOWING
DIVULGATIONS DOGMATICALLY DOMINATINGLY DOVETAILINGS DOWNLOADINGS
ECHOLOCATING ECOLOGICALLY EDAPHOLOGIES EDULCORATING EGOCENTRICAL
EGOISTICALLY ELLIPSOGRAPH EMIGRATIONAL EMPANOPLYING EROTOLOGICAL
ESCAPOLOGIES ESCAPOLOGIST ESCHATOLOGIC ETHNOLOGICAL ETYMOLOGICAL
EULOGISTICAL EXTRALOGICAL FESTIVALGOER FIBROMYALGIA FLAGELLATION
FLAGELLIFORM FLAGITATIONS FLAGITIOUSLY FLASHMOBBING FLEXOGRAPHIC
FLOCCULATING FLOWCHARTING FLUORIDATING FLUORINATING FOOTFAULTING
FORBEARINGLY FOREPLANNING FORESLACKING FORESTALLING FORETRIANGLE
FORGEABILITY FOTHERGILLAS FRANKALMOIGN FREELOADINGS FULGURATIONS
GALACTOSEMIA GALACTOSEMIC GALACTOSIDES GALLINACEOUS GANCICLOVIRS
GANGLIONATED GANGLIOSIDES GAOLBREAKING GARBOLOGISTS GASOMETRICAL
GASTROLOGIES GASTROLOGIST GASTRULATION GELATINATION GELATINOUSLY
GEMMOLOGICAL GEMMULATIONS GENEALOGICAL GENEALOGISED GENEALOGISES
GENEALOGISTS GENEALOGIZED GENEALOGIZES GENERATIONAL GENETHLIACON
GENICULATION GEOBOTANICAL GEOCENTRICAL GEODETICALLY GEODYNAMICAL
GEOGNOSTICAL GEOGRAPHICAL GEOLOCATIONS GEOLOGICALLY GEOPOLITICAL
GEOSYNCLINAL GEOTECHNICAL GERATOLOGIES GERATOLOGIST GESTICULATOR
GLACIOLOGIES GLACIOLOGIST GLADIATORIAL GLADIATORIAN GLAMOURISING
GLAMOURIZING GLANDIFEROUS GLASSBLOWING GLIOBLASTOMA GLOBIGERINAE
GLOBIGERINAS GLOMERATIONS GLOSSARIALLY GLOSSEMATICS GLOSSODYNIAS
GLOSSOLALIAS GLOSSOLALIST GLUCOKINASES GLUCOSAMINES GLUCOSIDASES
GLUTATHIONES GLYCOSIDASES GNOMONICALLY GOALKEEPINGS GOALKICKINGS
GOALTENDINGS GOLIARDERIES GOLIATHISING GOLIATHIZING GONFALONIERS
GONIMOBLASTS GORILLAGRAMS GRALLATORIAL GRANDIFLORAS GRANOLITHICS
GRANULATIONS GRANULOCYTIC GRAPHOLOGIES GRAPHOLOGIST GRATUITOUSLY
GRATULATIONS GREGARIOUSLY GROSSULARITE GYNAECOLOGIC GYNIOLATRIES
HAEMATOLOGIC HAEMOGLOBINS HAGIOLATRIES HAGIOLATROUS HAGIOLOGICAL
HAGIOLOGISTS HALLUCINOGEN HALOGENATING HALOGENATION HAMARTIOLOGY
HAPTOGLOBINS HELICOGRAPHS HELIOGRAPHED HELIOGRAPHER HELIOGRAPHIC
HELIOGRAVURE HEMATOLOGIES HEMATOLOGIST HEPATICOLOGY HEPATOLOGIES
HEPATOLOGIST HIEROLOGICAL HISTOLOGICAL HOLOGRAPHIES HOLOGRAPHING
HOMOLOGATING HOMOLOGATION HOOLIGANISMS HYDROLOGICAL HYDROPLANING
HYMNOLOGICAL HYPNOLOGICAL HYPOGLYCEMIA ICHNOLOGICAL ICONOLOGICAL
IDIOGLOSSIAS IDOLATRISING IDOLATRIZING ILLOGICALITY INCOAGULABLE
INCOGNISABLE INCOGNIZABLE INOSCULATING INTERROGABLE INVIGILATION
INVIGILATORS IRRIGATIONAL JOURNALISING JOURNALIZING JOURNALLINGS
KARYOLOGICAL KARYOLOGISTS LABOURSAVING LANDBOARDING LANDHOLDINGS
LANGOUSTINES LARYNGOLOGIC LEAPFROGGING LEGALISATION LEGALIZATION
LEGIONNAIRES LEGISLATIONS LEGITIMATION LEGITIMATORS LEXICOGRAPHY
LIGULIFLORAL LIMACOLOGIES LIMACOLOGIST LIMNOLOGICAL LIPOGRAPHIES
LITHOGRAPHED LITHOGRAPHER LITHOGRAPHIC LITHOLOGICAL LITHOPHAGOUS
LOGAGRAPHIAS LOGANBERRIES LOGANIACEOUS LOGICALITIES LOGISTICALLY
LOGISTICIANS LOGNORMALITY LOGODAEDALIC LOGOGRAPHIES LOGOMACHISTS
LOLLYGAGGING LONGICAUDATE LONGIPENNATE LONGIROSTRAL LONGITUDINAL
LYMPHANGIOMA MAGNILOQUENT MAILSHOTTING MALACOLOGIES MALACOLOGIST
MAMMALOGICAL MAMMALOGISTS MARTYROLOGIC MEDALLIONING MEGALOCARDIA
MEGALOMANIAC MEGALOMANIAS MELLIPHAGOUS MEREOLOGICAL METABOLISING
METABOLIZING METALLOGENIC METALWORKING METROLOGICAL MICROLOGICAL
MINERALOGIES MINERALOGISE MINERALOGIST MINERALOGIZE MISALLOTTING
MISCATALOGED MISCATALOGUE MISLABOURING MONADOLOGIES MONOLINGUALS
MONSIGNORIAL MUCILAGINOUS MULTIMEGATON MUSEOLOGICAL MYOGRAPHICAL
MYSTAGOGICAL MYTHOLOGIANS MYTHOLOGICAL NAVIGATIONAL NECROLOGICAL
NEMATOLOGIES NEMATOLOGIST NEOLOGICALLY NEPHOLOGICAL NEUROLOGICAL
NITROGELATIN NOBILITATING NOMINALISING NOMINALIZING NONAGESIMALS
NONALGEBRAIC NONALIGNMENT NONGENITALLY NONINTEGRALS NONLADDERING
NONLOGICALLY NONMALIGNANT NOSTOLOGICAL OBLIGATIONAL OBLIGATORILY
OBLITERATING OBNUBILATING OCEANOLOGIES OCEANOLOGIST OLEAGINOUSLY
OLEOGRAPHIES OLEOMARGARIN OLIGARCHICAL OLIGOCHAETES OLIGOPHAGIES
OLIGOPHAGOUS OLIGOSPERMIA ONOMASIOLOGY OPHIOLOGICAL OPTIMALISING
OPTIMALIZING ORGANISMALLY ORGANOLEPTIC ORGANOLOGIES ORGANOLOGIST
ORGASMICALLY ORGASTICALLY ORIGINALISMS ORIGINALISTS ORNITHOGALUM
OROGENICALLY OROGRAPHICAL OROLOGICALLY OSCILLOGRAMS OSCILLOGRAPH
OSTEOLOGICAL OUTBALANCING OUTCAVILLING OUTGALLOPING OUTLAUNCHING
OUTRIVALLING OUTSPARKLING OUTTRAVELING OVERCLAIMING OVERCLEANING
OVERCLEARING OVERGLANCING OVERHANDLING OVERLABORING OVERLEARNING
OVERPEDALING OVERPLANNING OVERPLANTING PAEDOLOGICAL PAEDOLOGISTS
PALAEBIOLOGY PALAEOLOGIES PALEOBIOLOGY PALEOGRAPHIC PALYNOLOGIES
PALYNOLOGIST PAPYROLOGIES PAPYROLOGIST PARABOLISING PARABOLIZING
PARALOGISING PARALOGISTIC PARALOGIZING PARASITOLOGY PARLEYVOOING
PAROEMIOLOGY PATHOBIOLOGY PATHOLOGICAL PATHOLOGISED PATHOLOGISES
PATHOLOGISTS PATHOLOGIZED PATHOLOGIZES PATROLOGICAL PATROLOGISTS
PELARGONIUMS PERINATOLOGY PESTOLOGICAL PETROLOGICAL PHAENOLOGIES
PHAGOCYTICAL PHENOLOGICAL PHILOLOGIANS PHILOLOGICAL PHLEGMAGOGIC
PHONOLOGICAL PHOTOGELATIN PHRASEOLOGIC PHYCOLOGICAL PHYTOLOGICAL
PLAGIOCLASES PLAGIOCLIMAX PLAGIOSTOMES PLAGIOTROPIC PLANOGRAPHIC
PLASMINOGENS PLASMOGAMIES PLASMOLYSING PLASMOLYZING PLASTOGAMIES
PLATFORMINGS PLUMBAGINOUS POLYGAMISING POLYGAMIZING POLYGRAPHIES
POLYGRAPHING POLYGRAPHIST POPULARISING POPULARIZING POSTILLATING
POSTSURGICAL POTAMOLOGIES POTAMOLOGIST PRAXEOLOGIES PREALLOTTING
PRIMOGENITAL PRODIGALISED PRODIGALISES PRODIGALIZED PRODIGALIZES
PROFLIGACIES PROFLIGATELY PROLONGATING PROLONGATION PROMULGATING
PROMULGATION PSALMODISING PSALMODIZING PSEUDOLOGIAS PUGNACIOUSLY
PYELOGRAPHIC PYRAMIDOLOGY RADIOBIOLOGY RADIOECOLOGY RADIOLOGICAL
RADIOLOGISTS RAILROADINGS REALLOCATING RECATALOGING RECOGNISABLE
RECOGNISABLY RECOGNIZABLE RECOGNIZABLY REGIONALISED REGIONALISES
REGIONALISMS REGIONALISTS REGIONALIZED REGIONALIZES REMORALISING
REMORALIZING RENEGOTIABLE REPOLARISING REPOLARIZING REPOPULATING
REREGULATION RESWALLOWING REVALORISING REVALORIZING RHINOLOGICAL
ROADBLOCKING ROADBUILDING ROADHOLDINGS ROPEWALKINGS SACRILEGIOUS
SAILBOARDING SAILBOATINGS SALPIGLOSSES SALPIGLOSSIS SANGUINOLENT
SAPROLEGNIAS SATANOLOGIES SCAFFOLDINGS SCATOLOGICAL SCATOLOGISTS
SEIGNIORALTY SEMATOLOGIES SEMIGLOBULAR SEMIOLOGICAL SHAREHOLDING
SIGILLATIONS SLAVEHOLDING SLOGANEERING SLOGANISINGS SLOGANIZINGS
SMALLHOLDING SNOWBLADINGS SOCIALISINGS SOCIALIZINGS SOCIOLOGICAL
SOMATOLOGIES SOMATOLOGIST SPANIOLATING SPANIOLISING SPANIOLIZING
SPECIALOGUES SPONGIOBLAST SPORANGIOLES SPORANGIOLUM STAGFLATIONS
STAKEHOLDING STEAMROLLING STIGMASTEROL STONEWALLING STROBILATING
STYLOGRAPHIC SUBTOTALLING SULPHONATING SYMBOLOGICAL TAILHOPPINGS
TAILORMAKING TAUTOLOGICAL TAUTOLOGISED TAUTOLOGISES TAUTOLOGISMS
TAUTOLOGISTS TAUTOLOGIZED TAUTOLOGIZES TEETOTALLING TELEOLOGICAL
TERATOLOGIES TERATOLOGIST TRAGICOMICAL TRAMPOLINING TRIBOLOGICAL
TRICHOGYNIAL TRIPHTHONGAL TROPOLOGICAL UGLIFICATION UNAPOLOGETIC
UNCOALESCING UNCONCEALING UNCONGEALING UNDERLOADING UNECOLOGICAL
UNFORGIVABLE UNFORGIVABLY UNGLAMORISED UNGLAMORIZED UNGRACIOUSLY
UNMORALISING UNMORALIZING UNNEGOTIABLE URBANOLOGIES URBANOLOGIST
URINOGENITAL USTILAGINOUS VAGINICOLINE VAGINICOLOUS VAINGLORIOUS
VAINGLORYING VEGETATIONAL VITRIOLATING VOLATILISING VOLATILIZING
VOLCANOLOGIC VULCANOLOGIC VULVOVAGINAL WALLCOVERING WATERFOWLING
WATERLOGGING WEBLIOGRAPHY WELLINGTONIA WHOLESALINGS WINDLOADINGS
XENOGLOSSIAS XYLOGRAPHIES XYLOGRAPHING ZOOGRAPHICAL ZOOLOGICALLY
ZYGODACTYLIC