There are 668 twelve-letter words containing A, E, G, L and S, https://www.bestwordlist.com/c/a/5/12letterwordswithaegls.htm ACKNOWLEDGES ACROGENOUSLY ACROMEGALICS ACROMEGALIES ADULTERISING AEROSOLISING AEROSOLIZING AETIOLOGISTS AGGLOMERATES AGGLUTINATES AGGRESSIVELY AGNOIOLOGIES AGRICULTURES AIGUILLETTES ALBUMENISING ALEGGEAUNCES ALLEGORISERS ALLEGORISING ALLEGORIZERS ALLOANTIGENS ALMIGHTINESS ALPHATESTING AMBLYGONITES AMELOGENESES AMELOGENESIS ANGELOLOGIES ANGELOLOGIST ANGIOSPERMAL ANGLEBERRIES ANGLERFISHES ANGULARITIES ANTHOLOGISED ANTHOLOGISER ANTHOLOGISES ANTHOLOGIZES ANTIGROPELOS APPETISINGLY APPLERINGIES ARCHEOLOGIES ARCHEOLOGIST ARCHIPELAGOS ARGILLACEOUS ARISTOLOGIES ASPERGILLUMS ASSEMBLAGIST ASSOILZIEING ASTACOLOGIES ASTRINGENTLY ASTROGEOLOGY AUTECOLOGIES AUTOGENOUSLY BALNEOLOGIES BALNEOLOGIST BATTLEWAGONS BEADBLASTING BEGGARLINESS BELLYACHINGS BEPLASTERING BESTIALISING BESTIALIZING BESTRADDLING BILLINGSGATE BLUEJACKINGS BLUESNARFING BRACHYLOGIES BREASTPLOUGH CABLECASTING CALENDERINGS CALLIBOGUSES CALLIGRAMMES CALYPTROGENS CANDLELIGHTS CARAMELISING CARDIOLOGIES CARPHOLOGIES CATALOGUISED CATALOGUISES CATALOGUIZES CENTRALISING CENTRIFUGALS CEPHALALGIAS CEPHALALGICS CHANDLERINGS CHANGELESSLY CHANNELISING CHASTENINGLY CLADOGENESES CLADOGENESIS CLEISTOGAMIC CLIFFHANGERS CLISTOGAMIES CLOISONNAGES COLLAGENASES COLLEGIALISM COLLEGIANERS CONFLAGRATES CONGEALMENTS CONGELATIONS CONVALESCING COURAGEOUSLY CRANIOLOGIES CYCLOPLEGIAS DAUGHTERLESS DECIMALISING DECOLLETAGES DECREASINGLY DEERSTALKING DEFLAGRATORS DEGLAMORISED DEGLAMORISES DEGLAMORIZES DEGLUTINATES DELOCALISING DEMORALISING DEPHLEGMATES DEPOLARISING DEREGULATORS DESALINATING DESALINISING DESALINIZING DESCRAMBLING DESOLATINGLY DESPAIRINGLY DETASSELLING DEVALORISING DEVITALISING DEVOCALISING DIAGNOSEABLE DIAGONALISED DIAGONALISES DIAGONALIZES DIGRESSIONAL DISAGREEABLE DISAGREEABLY DISANALOGIES DISEMBRANGLE DISENSLAVING DISENTAILING DISENTANGLED DISENTANGLES DISGAVELLING DISREGARDFUL DOVETAILINGS DRAWLINGNESS DRUNKALOGUES EARLIERISING EARSPLITTING EDAPHOLOGIES EGALITARIANS EGOISTICALLY ELASTICATING ELASTICISING ELASTICIZING ELECTROGRAMS ELLIPSOGRAPH EMASCULATING EMPLASTERING ENGRAILMENTS ENLARGEDNESS ENLARGEMENTS ENVASSALLING ERGASTOPLASM ESCAPOLOGIES ESCAPOLOGIST ESCHATOLOGIC ESPAGNOLETTE ESTABLISHING ESTRANGHELOS ETERNALISING EULOGISTICAL EVANGELICALS EVANGELICISM EVANGELISERS EVANGELISING EVANGELISTIC EVANGELIZERS EVERLASTINGS EXHAUSTINGLY EXSUFFLATING FACSIMILEING FARSIGHTEDLY FARTHINGALES FARTHINGLESS FEDERALISING FESTIVALGOER FIBERGLASSED FIBERGLASSES FIBREGLASSED FIBREGLASSES FINGERPLATES FINGERSTALLS FLABBERGASTS FLAGELLATORS FLAGGINESSES FLAGRANTNESS FORESLACKING FORESTALLING FOTHERGILLAS FRANKPLEDGES FREELOADINGS FRUGALNESSES GABERLUNZIES GAINLESSNESS GAINLINESSES GALACTOSEMIA GALACTOSEMIC GALACTOSIDES GALANTAMINES GALIMATIASES GALLBLADDERS GALLERYGOERS GALLIARDISES GALLINACEANS GALLINACEOUS GALLINIPPERS GALLOGLASSES GALLSICKNESS GALRAVITCHES GALVANOSCOPE GAMOPETALOUS GAMOSEPALOUS GANGLIOSIDES GANGSTERLAND GASHLINESSES GASOMETRICAL GASTROLOGERS GASTROLOGIES GEANTICLINES GELATINISERS GELATINISING GELATINIZERS GELATINOUSLY GEMMULATIONS GENEALOGISED GENEALOGISES GENEALOGISTS GENEALOGIZES GENERALISERS GENERALISING GENERALITIES GENERALIZERS GENERALSHIPS GENIALNESSES GENTIANELLAS GEOGNOSTICAL GEOLOCATIONS GEOSYNCLINAL GERATOLOGIES GERATOLOGIST GESELLSCHAFT GESTICULATED GESTICULATES GESTICULATOR GILRAVITCHES GIRDLESTEADS GLABROUSNESS GLACIOLOGIES GLADSOMENESS GLAIRINESSES GLANDIFEROUS GLASSBLOWERS GLASSCUTTERS GLASSINESSES GLASSPAPERED GLASSWORKERS GLASSYHEADED GLAUCESCENCE GLAUCOUSNESS GLOBIGERINAS GLOBULARNESS GLOMERATIONS GLOSSEMATICS GLUCOKINASES GLUCOSAMINES GLUCOSIDASES GLUTAMINASES GLUTATHIONES GLYCERINATES GLYCOSIDASES GLYCOSYLATED GLYCOSYLATES GOALKEEPINGS GOALTENDINGS GOLIARDERIES GONFALONIERS GOOGLEWHACKS GRACEFULLEST GRACEFULNESS GRADABLENESS GRADUALITIES GRAMMALOGUES GRANULOCYTES GRAPHOLOGIES GRATEFULLEST GRATEFULNESS GRATILLITIES GREENMAILERS GREGARIOUSLY GRIDDLECAKES GROSSULARITE GUERILLAISMS GUERRILLAISM GUTTURALISED GUTTURALISES GUTTURALIZES GUTTURALNESS GYNIOLATRIES HAEMOGLOBINS HAGIOLATRIES HEADSTRONGLY HELICOGRAPHS HELLGRAMITES HEMATOLOGIES HEMATOLOGIST HEPATOLOGIES HEPATOLOGIST HESITATINGLY HOLOGRAPHERS HOLOGRAPHIES HYPERALGESIA HYPERALGESIC ILLEGALISING ILLEGALITIES INCOGNISABLE INCREASINGLY INELEGANCIES INTERLEAGUES INTERLINGUAS INTERTANGLES INVESTIGABLE IRREGARDLESS KEELHAULINGS LAGGARDLIEST LALLYGAGGERS LAMMERGEIERS LAMMERGEYERS LAMPLIGHTERS LANDGRAVATES LANDGRAVINES LANGBEINITES LANGOUSTINES LANGUAGELESS LANGUISHMENT LARYNGITIDES LARYNGITISES LARYNGOSCOPE LATERALISING LAWBREAKINGS LEATHERGOODS LEGALISATION LEGERDEMAINS LEGIONNAIRES LEGISLATIONS LEGISLATIVES LEGISLATRESS LEGISLATURES LEGITIMACIES LEGITIMATISE LEGITIMATORS LEMONGRASSES LETHARGISING LEUCAEMOGENS LEUKAEMOGENS LEXICALISING LEXIGRAPHIES LIBERALISING LIBERTINAGES LIMACOLOGIES LINEBACKINGS LINECASTINGS LIPOGRAPHIES LITERALISING LOGANBERRIES LOGANIACEOUS LOGICALITIES LOGODAEDALUS LOGOGRAPHERS LOGOGRAPHIES LOLLYGAGGERS LONGSHOREMAN LUCKENGOWANS MAGNETISABLE MALACOLOGIES MALIGNANCIES MANSLAUGHTER MARGINALISED MARGINALISES MARGINALIZES MARLINGSPIKE MASKALLONGES MEDICALISING MEGALOBLASTS MEGALOMANIAS MEGALOSAURUS MELLIPHAGOUS METABOLISING METAGALAXIES METALLIDINGS METALLURGIES METALLURGIST MILLIGAUSSES MILLIGRAMMES MINERALISING MINERALOGIES MINERALOGISE MINERALOGIST MISALIGNMENT MISCATALOGED MISCATALOGUE MISCHALLENGE MISLABELLING MISLEADINGLY MISPLEADINGS MONADOLOGIES MUSEOLOGICAL NAUSEATINGLY NEMATOLOGIES NEMATOLOGIST NEUTRALISING NIGGARDLIEST NIGHTCLASSES NIGHTINGALES NIGHTWALKERS NONAGESIMALS NONDELEGATES NONINTEGRALS NONLANGUAGES NOTUNGULATES NUCLEARISING OCEANOLOGIES OCEANOLOGIST OLEAGINOUSLY OLEOGRAPHIES OLIGOCHAETES OLIGOPHAGIES OLIGOSPERMIA ORGANOLOGIES OSTEOLOGICAL OUTRAGEOUSLY OVERSLAUGHED OVERVOLTAGES PAEDOLOGISTS PALAEOLOGIES PALINGENESES PALINGENESIA PALINGENESIS PALSGRAVINES PALYNOLOGIES PAPYROLOGIES PARAGLOSSATE PARALLELINGS PATHOLOGISED PATHOLOGISES PATHOLOGIZES PEDESTALLING PELARGONIUMS PESTOLOGICAL PHAENOLOGIES PHRASEOLOGIC PILGRIMAGERS PLAGIARISERS PLAGIARIZERS PLAGIOCLASES PLAGIOSTOMES PLANOGAMETES PLANTIGRADES PLASMINOGENS PLASMOGAMIES PLASTOGAMIES PLATEGLASSES PLATELAYINGS PLATEMAKINGS PLEASINGNESS PLECTOGNATHS PLEXIGLASSES PLOUGHSHARES POLYGRAPHERS POLYGRAPHIES POTAMOLOGIES PRAXEOLOGIES PRERELEASING PRESAGEFULLY PRESIGNALING PRESIGNALLED PRESLAUGHTER PRODIGALISED PRODIGALISES PRODIGALIZES PROFLIGACIES PSEUDOLOGIAS PTYALAGOGUES PYROGALLATES QUARRELLINGS RACEWALKINGS RAMPAGEOUSLY REALIGNMENTS REASSEMBLAGE REASSEMBLING REASSURINGLY RECANALISING RECATALOGUES RECHALLENGES RECOGNISABLE RECOGNISABLY REDISPLAYING REESCALATING REGARDLESSLY REGIONALISED REGIONALISES REGIONALISMS REGIONALISTS REGIONALIZES REGISTERABLE REGULARISING REGULARITIES REINSTALLING RELATIVISING REMORALISING REPLASTERING REPOLARISING RESWALLOWING REVALORISING REVITALISING ROPEWALKINGS SACRILEGIOUS SACRILEGISTS SALMAGUNDIES SALPIGLOSSES SANGUINOLENT SAPROLEGNIAS SATANOLOGIES SAUNTERINGLY SCAFFOLDAGES SCAPEGALLOWS SCATTERINGLY SCATTERLINGS SEARCHLIGHTS SECULARISING SECULARIZING SEIGNIORALTY SELAGINELLAS SELENOGRAPHS SELENOGRAPHY SEMATOLOGIES SEMIGLOBULAR SEMIOLOGICAL SENSUALISING SENSUALIZING SEXAGESIMALS SEXANGULARLY SHAREHOLDING SHATTERINGLY SHELLACKINGS SINGABLENESS SINGLETRACKS SINGULARISED SINGULARISES SINGULARIZED SINGULARIZES SINGULARNESS SKILLIGALEES SLANGINESSES SLAUGHTERERS SLAUGHTERIES SLAUGHTERING SLAUGHTERMAN SLAUGHTERMEN SLAUGHTEROUS SLAVEHOLDING SLEDGEHAMMER SLEEPWALKING SLOCKDOLAGER SLOGANEERING SLUGGARDISED SLUGGARDISES SLUGGARDIZED SLUGGARDIZES SLUGGARDLIER SLUGGARDNESS SMATTERINGLY SNAGGLETEETH SNAGGLETOOTH SOCKDOLAGERS SOMATOLOGIES SPACEFLIGHTS SPACEWALKING SPARKPLUGGED SPECIALISING SPECIALIZING SPECIALOGUES SPEEDBALLING SPHACELATING SPLENOMEGALY SPORANGIOLES SPRACHGEFUHL SPREADEAGLED STAGGERINGLY STAKEHOLDING STAMMERINGLY STANCHELLING STEAMROLLING STEELMAKINGS STIGMASTEROL STONEWALLING STRANGLEHOLD STRANGLEMENT STRANGULATED STRANGULATES STREAMLINING STRINGHALTED SUBLANGUAGES SUBUNGULATES SUPERGLACIAL SWAGGERINGLY SYNERGICALLY TAGLIATELLES TALEBEARINGS TALETELLINGS TANGIBLENESS TAUTOLOGISED TAUTOLOGISES TAUTOLOGIZES TELEBANKINGS TELECOTTAGES TELEGRAPHERS TELEGRAPHESE TELEGRAPHIES TELEGRAPHIST TELEMESSAGES TERATOLOGIES TERATOLOGIST TESSELLATING TETRAPLEGIAS THEOLOGASTER THERMALISING TIMETABLINGS TRAGICALNESS TRIANGULATES UMBRAGEOUSLY UNASSIGNABLE UNCOALESCING UNDERLEASING UNDERSEALING UNGAINLINESS UNGLAMORISED UNGUICULATES UNPLEASINGLY UNRAVELLINGS UNVULGARISED UNVULGARISES UNVULGARIZES URBANOLOGIES VEGETABLIEST VESICULATING VICTUALLAGES VIGILANTNESS WAGELESSNESS WALDGRAVINES WATCHGLASSES WATERGLASSES WEATHERGIRLS WEATHERGLASS WHOLESALINGS WINEGLASSFUL WRANGLERSHIP XENOGLOSSIAS XYLOGRAPHERS XYLOGRAPHIES