There are 761 twelve-letter words containing A, G, R, S and T, https://www.bestwordlist.com/c/a/5/12letterwordswithagrst.htm
ABRIDGEMENTS ACAROLOGISTS ADULTERISING ADVENTURINGS ADVERTISINGS
ADVERTIZINGS AFTERGRASSES AFTERGROWTHS AGGLOMERATES AGGRADATIONS
AGGRAVATIONS AGGREGATIONS AGGRESSIVITY AGRICULTURES AGRIPRODUCTS
AGRITOURISMS AGRITOURISTS AGROFORESTER AGROFORESTRY AGROINDUSTRY
AGROSTEMMATA AGROSTOLOGIC AGROTOURISMS AGROTOURISTS AGUARDIENTES
AIRTIGHTNESS ALPHASORTING AMALGAMATORS AMPHIGASTRIA ANDROLOGISTS
ANGULARITIES ANNABERGITES ANOTHERGUESS ANTHOLOGISER ANTIESTROGEN
ANTIGROPELOS ARBITRAGEURS ARCHEOLOGIST ARGUTENESSES ARISTOLOGIES
ARRAIGNMENTS ARRANGEMENTS ARTERIOGRAMS ASCERTAINING ASPERGATIONS
ASSEVERATING ASTRINGENCES ASTRINGENTLY ASTROBIOLOGY ASTROGEOLOGY
ASTROLOGICAL ASTROLOGISTS ASTROTURFING AUTOCHANGERS AUTOGRAPHIES
AUTOGRAVURES BACKDRAUGHTS BACKSTARTING BACKSTRAIGHT BACKSTROKING
BAREBOATINGS BARGEMASTERS BARNSTORMING BASTARDISING BASTARDIZING
BEARBAITINGS BEARDTONGUES BEPLASTERING BESCATTERING BESPATTERING
BESTRADDLING BRAGGARTISMS BRATTISHINGS BREAKFASTING BREASTPLOUGH
BROADCASTING BROWBEATINGS BURGOMASTERS CALYPTROGENS CARDIOLOGIST
CARPOLOGISTS CATEGORISING CENTIGRAMMES CENTIMORGANS CENTRALISING
CENTRIFUGALS CERARGYRITES CEROGRAPHIST CHARGESHEETS CHEATGRASSES
CIRCULATINGS COASTEERINGS COGENERATORS COLOGARITHMS COLORCASTING
COMPURGATORS CONFIGURATES CONFLAGRATES CONGREGATORS CONSECRATING
CONSIGNATORY CONSTRAINING CONVERSATING COPROPHAGIST CORRUGATIONS
CRANIOLOGIST CRYPTOGAMIES CRYPTOGAMIST CRYPTOGAMOUS CRYPTOGRAPHS
CRYSTALISING CRYSTALIZING DACTYLOGRAMS DAUGHTERLESS DEASPIRATING
DEERSTALKING DEFLAGRATORS DEGRADATIONS DEMAGNETISER DEMIGRATIONS
DEMOGRAPHIST DENATURISING DENIGRATIONS DERAIGNMENTS DERANGEMENTS
DEREGULATORS DERIVATISING DESAGREMENTS DESATURATING DESEGREGATED
DESEGREGATES DESIDERATING DIGITIGRADES DIGLADIATORS DISAGGREGATE
DISAGREEMENT DISFEATURING DISGRADATION DISGREGATION DISINTEGRATE
DISSERTATING DISTRAUGHTLY DISTRINGASES DOWNDRAUGHTS DRAGONFRUITS
DRAMATURGIES DRAMATURGIST DRAUGHTINESS DREADNAUGHTS DREADNOUGHTS
DRUMBEATINGS EARSPLITTING EARTHMOVINGS EARTHSHAKING EAVESTROUGHS
EGALITARIANS ELECTROGRAMS EMPLASTERING ENERGISATION ENGRAFTMENTS
ENGRAILMENTS ENLARGEMENTS ENTREASURING EPIGRAPHISTS ERGASTOPLASM
ERGATIVITIES ERGATOMORPHS ESTRANGEMENT ESTRANGHELOS ETERNALISING
EVERLASTINGS EVISCERATING EXAGGERATORS EXASPERATING EXCOGITATORS
EXPURGATIONS EXTRAVAGATES FARSIGHTEDLY FARTHINGALES FARTHINGLESS
FEATHEREDGES FENESTRATING FERRIMAGNETS FERROMAGNETS FERTIGATIONS
FESTIVALGOER FINGERPLATES FINGERSTALLS FLABBERGASTS FLAGELLATORS
FLAGRANTNESS FOOTDRAGGERS FORECASTINGS FORESTALLING FOTHERGILLAS
FRAGMENTATES FRAGMENTISED FRAGMENTISES FRAGMENTIZES FRAGRANTNESS
FRATERNISING FREESTANDING FULGURATIONS GAINSTRIVING GALRAVITCHES
GAMETOPHORES GAMMERSTANGS GAMOTROPISMS GANGSTERDOMS GANGSTERISMS
GANGSTERLAND GARBOLOGISTS GARNISHMENTS GASOMETRICAL GASTROCNEMII
GASTROLOGERS GASTROLOGIES GASTROLOGIST GASTRONOMERS GASTRONOMICS
GASTRONOMIES GASTRONOMIST GASTROPLASTY GASTROPODANS GASTROPODOUS
GASTROSCOPES GASTROSCOPIC GASTROSOPHER GASTROTOMIES GASTROTRICHS
GASTRULATING GASTRULATION GATECRASHERS GATECRASHING GAZETTEERISH
GELATINISERS GELATINIZERS GENERALITIES GENERATRICES GEOSTRATEGIC
GERATOLOGIES GERATOLOGIST GERMINATIONS GERONTOCRATS GESTICULATOR
GILRAVITCHES GIRDLESTEADS GLASSCUTTERS GLOMERATIONS GLYCERINATES
GNATCATCHERS GODDAUGHTERS GOSSAMERIEST GOUVERNANTES GOVERNORATES
GRACEFULLEST GRACIOSITIES GRADIOMETERS GRADUALISTIC GRADUALITIES
GRADUATESHIP GRAMMATICISE GRAMMATICISM GRAMOPHONIST GRANDFATHERS
GRANDMASTERS GRANDMOTHERS GRANDPARENTS GRANDSTANDED GRANDSTANDER
GRANITEWARES GRANOLITHICS GRANULATIONS GRANULOCYTES GRAPHITISING
GRAPHOLOGIST GRATEFULLEST GRATEFULNESS GRATILLITIES GRATUITOUSLY
GRATULATIONS GRAVIMETRIES GRAVITATIONS GRAVITROPISM GREASEPAINTS
GROATSWORTHS GROSSULARITE GROUNDWATERS GUBERNATIONS GUITARFISHES
GURGITATIONS GUTTURALISED GUTTURALISES GUTTURALISMS GUTTURALIZES
GUTTURALNESS GYMNATORIUMS GYNIOLATRIES HAGIOLATRIES HAGIOLATROUS
HAIRCUTTINGS HAIRSTYLINGS HAMSTRINGING HANDWRITINGS HARDSTANDING
HEADSTRONGLY HEARTSTRINGS HECTOGRAMMES HELLGRAMITES HETEROGAMIES
HETEROGAMOUS HETEROGRAFTS HUCKSTERAGES HYDROGENATES HYGROCHASTIC
HYPOGASTRIUM IATROGENESES IATROGENESIS IDOLATRISING IGNORANTNESS
ILLUSTRATING IMMIGRATIONS IMMISERATING IMPIGNORATES IMPREGNATORS
INAUGURATORS INCRASSATING INGATHERINGS INGRAFTMENTS INGRATITUDES
INGRAVESCENT INGURGITATES INSTAGRAMMED INSTREAMINGS INTEGRATIONS
INTERCHANGES INTERDASHING INTERFACINGS INTERLEAGUES INTERLINGUAS
INTERROBANGS INTERROGANTS INTERROGATES INTERSPACING INTERTANGLES
INTRANSIGENT INTRIGUANTES INVESTIGATOR INVIGILATORS INVIGORATORS
KARYOLOGISTS KERATINISING KERATOGENOUS KICKSTARTING KINETOGRAPHS
LAGGARDLIEST LAMPLIGHTERS LANDGRAVATES LARYNGITIDES LARYNGITISES
LATCHSTRINGS LATERALISING LEATHERGOODS LEGISLATRESS LEGISLATURES
LEGITIMATORS LETHARGISING LIBERTINAGES LITERALISING LONGIROSTRAL
MACROGAMETES MADRIGALISTS MAGISTERIUMS MAGISTRACIES MAGISTRALITY
MAGISTRATURE MAJORETTINGS MANGALSUTRAS MANSLAUGHTER MARATHONINGS
MARGINALISTS MARGINATIONS MARGRAVIATES MASTERSINGER MASTIGOPHORE
MASTURBATING MEGAPROJECTS MEGASTARDOMS MENSTRUATING MERCHANTINGS
MESOGASTRIUM METALLURGIES METALLURGIST METAPHRASING METEOROGRAMS
MICROGAMETES MIGRATIONIST MILITARISING MINERALOGIST MISCEGENATOR
MISFEATURING MISTREADINGS MONOGRAPHIST MYOGRAPHISTS NATURALISING
NEGOTIATRESS NEUTRALISING NIGGARDLIEST NIGHTMARIEST NIGHTWALKERS
NITROGENASES NONARGUMENTS NONGRADUATES NONINTEGRALS NONSTRATEGIC
NUGATORINESS OBJURGATIONS OCTOGENARIES ODONTOGRAPHS OPISTHOGRAPH
OPPIGNERATES OPPIGNORATES ORGANICISTIC ORGANICITIES ORGANISATION
ORGANISTRUMS ORGANOLOGIST ORGASTICALLY ORIGINALISTS ORIGINATIONS
OSTREOPHAGES OUTMARRIAGES OUTMASTERING OUTMEASURING OUTORGANISED
OUTORGANISES OUTORGANIZES OUTRAGEOUSLY OUTREASONING OUTSAVOURING
OUTSCREAMING OUTSPARKLING OUTSPREADING OUTSTRAINING OVERCASTINGS
OVERCOATINGS OVERDRAUGHTS OVERFATIGUES OVERGARMENTS OVERHEATINGS
OVERROASTING OVERSTAFFING OVERSTAINING OVERSTANDING OVERTRADINGS
OVERVOLTAGES PAPERWEIGHTS PAPYROLOGIST PARACHUTINGS PARAGLOSSATE
PARAGNATHISM PARAGNATHOUS PARAGRAPHIST PARALOGISTIC PARAPENTINGS
PARASITISING PARASITIZING PARASITOLOGY PARATUNGSTIC PARTIALISING
PASTEURISING PASTEURIZING PATRIALISING PATROLOGISTS PEREGRINATES
PERSONATINGS PERSPIRATING PHRAGMOPLAST PIGNERATIONS PIGNORATIONS
PLAGIARISTIC PLANTIGRADES PLATFORMINGS PLAYWRITINGS POETASTERING
POLYGRAPHIST POMEGRANATES POSTGRADUATE POSTORGASMIC POSTSURGICAL
PRAGMATICISM PRAGMATICIST PRAGMATISERS PRAGMATISING PRAGMATISTIC
PRAGMATIZERS PREADJUSTING PRECOGNISANT PREDESIGNATE PREFIGURATES
PREGUSTATION PREROGATIVES PRESAGEMENTS PRESLAUGHTER PRESTIGIATOR
PRETEENAGERS PRINTMAKINGS PROGNATHISMS PROMULGATORS PROPAGANDIST
PROPAGATIONS PROROGATIONS PROTAGONISMS PROTAGONISTS PURGATORIANS
PURITANISING PYRARGYRITES PYROGALLATES QUARRINGTONS RADIOLOGISTS
RANKSHIFTING RATBAGGERIES REAGGREGATES REALIGNMENTS REASSIGNMENT
RECATALOGUES REESCALATING REESTIMATING REFRIGERANTS REFRIGERATES
REGENERATORS REGIONALISTS REGISTERABLE REGISTRARIES REGISTRATION
REGULARITIES REGURGITANTS REGURGITATES REINSTALLING REINTEGRATES
RELATIVISING REMIGRATIONS RENEGOTIATES REOXYGENATES REPLASTERING
RESEGREGATED RESEGREGATES RESIGNATIONS RESTATIONING RESTRAININGS
RETROUSSAGES REVITALISING ROTOGRAVURES ROUGHCASTERS ROUGHCASTING
RUSTICATINGS SACRAMENTING SACRILEGISTS SAUNTERINGLY SCATTERGOODS
SCATTERGRAMS SCATTERINGLY SCATTERLINGS SCINTIGRAPHY SCRATCHINGLY
SEARCHLIGHTS SECRETAGOGIC SECRETAGOGUE SEGREGATIONS SEIGNIORALTY
SEPTUAGENARY SERGEANTSHIP SERONEGATIVE SHATTERINGLY SHIRTTAILING
SHORTCHANGED SHORTCHANGER SHORTCHANGES SHORTGRASSES SIDETRACKING
SIGNIFICATOR SINGLETRACKS SINGULARISTS SLAUGHTERERS SLAUGHTERIES
SLAUGHTERING SLAUGHTERMAN SLAUGHTERMEN SLAUGHTEROUS SMATTERINGLY
SPECTROGRAMS SPECTROGRAPH SPERMATOGENY SPHRAGISTICS SPRINGWATERS
STAGGERINGLY STAIRCASINGS STAMMERINGLY STARBOARDING STARFUCKINGS
STEAMROLLING STEERAGEWAYS STEGANOGRAMS STEGANOGRAPH STEGOCARPOUS
STEGOSAURIAN STENOGRAPHED STENOGRAPHER STENOGRAPHIC STEPDAUGHTER
STERCORATING STEREOGRAPHS STEREOGRAPHY STEVENGRAPHS STIGMASTEROL
STIGMATISERS STIGMATIZERS STRAGGLINGLY STRAIGHTAWAY STRAIGHTBRED
STRAIGHTEDGE STRAIGHTENED STRAIGHTENER STRAIGHTNESS STRAIGHTWAYS
STRANGLEHOLD STRANGLEMENT STRANGULATED STRANGULATES STRAPHANGERS
STRAPHANGING STRAPPADOING STRATEGISING STRATEGIZING STRATIGRAPHY
STRAWWEIGHTS STREAMLINING STRIDULATING STRINGBOARDS STRINGHALTED
STRINGYBARKS STRIPPAGRAMS STRIPPERGRAM STROBILATING STRONGARMING
STYLOGRAPHIC SUBAGGREGATE SUBFRAGMENTS SUBIRRIGATED SUBIRRIGATES
SUBROGATIONS SUBSTRACTING SUFFRAGETTES SUGARCOATING SULPHURATING
SUPEREROGANT SUPEREROGATE SUPERGRAVITY SUPERHEATING SUPRAGLOTTAL
SURFCASTINGS SURROGATIONS SWEETGRASSES TABULARISING TALEBEARINGS
TARGETITISES TELEGRAPHERS TELEGRAPHESE TELEGRAPHIES TELEGRAPHIST
TERATOGENIES TERATOLOGIES TERATOLOGIST TERGIVERSANT TERGIVERSATE
TERMAGANCIES TETRAPLEGIAS THANKSGIVERS THARBOROUGHS THAUMATURGES
THAUMATURGUS THEATERGOERS THEATREGOERS THEOLOGASTER THEREAGAINST
THERMALISING THERMOGRAPHS THOROUGHBASS THREATENINGS THROUGHFARES
THROUGHGAUNS TOMOGRAPHIES TOPOGRAPHERS TOPOGRAPHIES TORSIOGRAPHS
TRACKLAYINGS TRAFFICKINGS TRAGEDIENNES TRAGICALNESS TRANSCENDING
TRANSCRIBING TRANSFECTING TRANSFERRING TRANSFIGURED TRANSFIGURES
TRANSFORMING TRANSGENDERS TRANSGENESES TRANSGENESIS TRANSGRESSED
TRANSGRESSES TRANSGRESSOR TRANSHIPPING TRANSMIGRANT TRANSMIGRATE
TRANSMITTING TRANSMOGRIFY TRANSPORTING TRANSPOSINGS TRANSSHAPING
TRANSVAGINAL TRANSVALUING TRANSVERSING TRANSVESTING TRAPSHOOTING
TRAUMATISING TRIANGULATES TRITAGONISTS TRIVIALISING TYPOGRAPHERS
TYPOGRAPHIES TYPOGRAPHIST UNDERSTATING UNDERTAKINGS UNGUENTARIES
UNSEGREGATED UNTREASURING UPGRADATIONS URBANOLOGIST VANGUARDISTS
VARIEGATIONS VERBIGERATES VINAIGRETTES VINEGARETTES VIRGINALISTS
VIRTUALISING WAGONWRIGHTS WAITRESSINGS WARRANTISING WATCHSPRINGS
WATERGLASSES WATERSKIINGS WEATHERGIRLS WEATHERGLASS WEATHERISING
WHEATGRASSES WHEREAGAINST WIRETAPPINGS WITCHGRASSES ZOOGRAFTINGS
ZOOGRAPHISTS