There are 948 seven-letter words containing A, R, S and T, https://www.bestwordlist.com/c/a/4/7letterwordswitharst.htm
ABATERS ABATORS ABITURS ABORTUS ABREAST ABRUPTS ACATERS ACCURST
ACTRESS ACTURES ADDREST ADRATES ADVERTS AERATES AERIEST AEROSAT
AETHERS AFFRETS AFREETS AGISTER AGISTOR AGRASTE AIGRETS AIRIEST
AIRPOST AIRSHOT AIRSTOP ALASTOR ALBERTS AMEARST AMORETS AMORIST
AMRITAS AMTRACS AMTRAKS ANESTRA ANESTRI ANTARAS ANTHERS ANTHROS
ANTIARS ANTLERS ANTRUMS ANTSIER AORISTS APPORTS ARBLAST ARBUTES
ARBUTUS ARCHEST ARCTICS ARGENTS ARIDEST ARISTAE ARISTAS ARISTOS
ARKITES ARMLETS ARMPITS ARMREST AROINTS AROYNTS ARPENTS ARRESTS
ARSIEST ARTIEST ARTIGIS ARTISAN ARTISTE ARTISTS ARTLESS ARTSIER
ARTSIES ARTSMAN ARTSMEN ASHTRAY ASPORTS ASPROUT ASSARTS ASSERTS
ASSORTS ASTARTS ASTERIA ASTERID ASTERTS ASTHORE ASTRALS ASTRAND
ASTRICT ASTRIDE ASTROID ASTUTER ASTYLAR ATHIRST ATONERS ATRESIA
ATRESIC ATRIUMS ATTIRES ATTORNS ATTRAPS ATTRIST ATTRITS AUNTERS
AURATES AURISTS AUSTERE AUSTRAL AUTEURS AUTHORS AVATARS AWAREST
BAITERS BANTERS BARBETS BARBOTS BARBUTS BARGEST BARISTA BARITES
BARNETS BARRATS BARRETS BARTERS BARTONS BARTSIA BARYTAS BARYTES
BASTARD BASTERS BATARDS BATHERS BATLERS BATTERS BAXTERS BEATERS
BERATES BERTHAS BESTARS BETRAYS BLASTER BOASTER BOATERS BOGARTS
BORATES BORSTAL BRAATAS BRASSET BRAVEST BRAWEST BREASTS BREATHS
BRISANT BRITSKA BROASTS BROTHAS BURSATE BUSTARD CABRITS CANTARS
CANTERS CANTORS CAPTORS CARACTS CARATES CARITAS CARLOTS CARNETS
CARPETS CARRATS CARROTS CARTELS CARTERS CARTONS CASTERS CASTORS
CASTORY CASTRAL CAUTERS CAVORTS CERATES CHARETS CHARTAS CHASTER
CITRALS CLARETS COASTER COATERS COMARTS CONTRAS COSTARD COSTARS
COTTARS CRATERS CRATONS CRATURS CRAVATS CRAYEST CREATES CRESTAL
CRISTAE CROTALS CRUSTAE CRUSTAL CRUSTAS CRYSTAL CUATROS CURATES
CURTALS CUSTARD CZARIST DABSTER DAFTARS DARKEST DARNEST DARTERS
DARTLES DARTRES DASTARD DATURAS DAYSTAR DEAREST DEARTHS DEPARTS
DERATES DIARIST DIASTER DISPART DISRATE DOATERS DOTARDS DRAPETS
DRASTIC DRAUNTS DURANTS DURMAST DUSTRAG EARNEST EARSHOT EASTERN
EASTERS ECARTES ELATERS EMPARTS ENDARTS ENTRAPS EPATERS ERGATES
ERRANTS ERRATAS ESPARTO ESTRADE ESTRAYS ESTREAT ESTRUAL ESTUARY
FACTORS FAIREST FAITORS FALTERS FARMOST FASTERS FATHERS FAUREST
FAUTORS FEASTER FOOTRAS FORCATS FORMATS FOUTRAS FRACTUS FRATERS
FRETSAW GAGSTER GAITERS GARGETS GARNETS GAROTES GARRETS GARROTS
GARTERS GASTERS GASTRAL GASTREA GASTRIC GASTRIN GATHERS GRAITHS
GRATERS GRATINS GRAVEST GRAYEST GUITARS GYRATES GYTRASH HAFTERS
HAIRSTS HALTERS HAMSTER HARDEST HARDSET HARLOTS HARMOST HAROSET
HARPIST HARSLET HARTALS HARTENS HARVEST HASTIER HATREDS HATTERS
HEARTHS HEATERS IMARETS IMBRAST IMPARTS INDARTS INSTARS IRATEST
IRISATE JUMARTS JURANTS KANTARS KARAITS KARATES KARITES KARSTIC
KARTERS KASHRUT KATSURA KHURTAS KIRTANS KOTARES KRATERS LABRETS
LAMSTER LARGEST LARIATS LASTERS LATHERS LATRIAS LATRONS LATTERS
LIATRIS LUSTRAL MAESTRI MAESTRO MAFTIRS MAISTER MAISTRY MANTRAS
MARKETS MARMOTS MARTELS MARTENS MARTINS MARTYRS MASTERS MASTERY
MASTIER MATRASS MATRICS MATRONS MATROSS MATSURI MATTERS MATURES
MAYSTER MERCATS MISPART MISRATE MISTRAL MORTALS MORTARS MUSHRAT
MUSKRAT MUSTARD NARCIST NASTIER NATRONS NATTERS NATURES NEAREST
NECTARS NONARTS NUTBARS NUTRIAS OARIEST OESTRAL OLESTRA OMERTAS
ORALIST ORATORS ORBITAS ORCHATS ORGEATS ORGIAST OSETRAS OSSETRA
OSTIARY OSTMARK OSTRACA OSTRAKA OTARIES OUTBARS OUTSOAR OUTWARS
OVATORS OXCARTS PAIREST PALTERS PANTERS PARENTS PARGETS PAROTIS
PARROTS PARTANS PARTERS PARTIES PARTONS PASTERN PASTERS PASTIER
PASTORS PASTURE PATROLS PATRONS PATTERS PATZERS PERSALT PERSANT
PETARAS PETARDS PIARIST PIASTER PIASTRE PIRATES PITARAS PLASTER
PLATERS PORTALS POSTWAR PRATERS PRATIES PREACTS PRECAST PROTEAS
PSALTER PSALTRY QINTARS QUAREST QUARTES QUARTOS QUATRES RABATOS
RABBETS RABBITS RACHETS RACIEST RACISTS RACKETS RADDEST RADGEST
RAFTERS RAGOUTS RAGTAGS RAGTOPS RAIYATS RAMCATS RAMJETS RAMSTAM
RAMTILS RANKEST RANKIST RANTERS RAPISTS RAPTORS RASHEST RASTERS
RASTRUM RATBAGS RATCHES RATEENS RATFISH RATHEST RATINES RATINGS
RATIONS RATITES RATLINS RATOONS RATTANS RATTENS RATTERS RATTISH
RATTLES RATTONS RAVIEST RAYLETS REALEST REALIST REASTED REBAITS
REBATES REBATOS RECANTS RECASTS RECOATS REDACTS REDATES REHEATS
RELATES REMATES RENTALS REPASTS REPEATS RESEATS RESIANT RESLATE
RESTACK RESTAFF RESTAGE RESTAMP RESTART RESTATE RETACKS RETAILS
RETAINS RETAKES RETAMAS RETAPES RETARDS RETASTE RETAXES RETEAMS
RETEARS RETINAS RETSINA RIALTOS RISTRAS RITARDS RITUALS ROASTED
ROASTER ROASTIE ROBATAS ROBUSTA ROSEATE ROSTRAL ROTATES ROTTANS
ROTULAS ROUSANT RUBATOS RUGRATS SACRIST SAETERS SAIREST SAKERET
SALTERN SALTERS SALTERY SALTIER SALTIRE SALUTER SANTERA SANTERO
SANTIRS SANTOOR SANTOUR SANTURS SARMENT SARSNET SARTORS SASTRAS
SATARAS SATIRES SATIRIC SATORIS SATRAPS SATRAPY SATYRAL SATYRAS
SATYRES SATYRIC SATYRID SAUNTER SAUTOIR SCANTER SCARLET SCARTED
SCARTHS SCATTER SCRATCH SCROTAL SEAGIRT SEAPORT SEARATS SEAREST
SEATERS SECRETA SECTARY SEDATER SEMITAR SENATOR SERIATE SERRATE
SERRATI SERVANT SHAFTER SHARIAT SHASTER SHASTRA SHATTER SHERIAT
SHORTIA SIMITAR SITTARS SKARTHS SKATERS SLANTER SLARTED SLATERS
SLATHER SLATIER SLATTER SLIOTAR SMARTED SMARTEN SMARTER SMARTIE
SMARTLY SMATTER SNOTRAG SORBATE SORTALS SOUTARS SPAREST SPARTAN
SPARTHE SPARTHS SPATTER SPECTRA SPIRANT SPRAINT STABBER STABLER
STACKER STAFFER STAGERS STAGERY STAGGER STAGIER STAIDER STAINER
STAIRED STAKERS STALKER STAMMER STAMPER STANDER STAPLER STARCHY
STARDOM STARERS STARETS STARETZ STARING STARKED STARKEN STARKER
STARKLY STARLET STARLIT STARNED STARNIE STARRED STARTED STARTER
STARTLE STARTLY STARTSY STARTUP STARVED STARVER STARVES STATERS
STATORS STATURE STAYERS STAYRES STEALER STEAMER STEARED STEARES
STEARIC STEARIN STELLAR STERANE STERNAL STEWARD STIRRAH STIRRAS
STORAGE STRAFED STRAFER STRAFES STRAFFS STRAIKS STRAINS STRAINT
STRAITS STRAKED STRAKES STRAMPS STRANDS STRANGE STRAPPY STRATAL
STRATAS STRATHS STRATUM STRATUS STRAWED STRAWEN STRAYED STRAYER
STRAYVE STREAKS STREAKY STREAMS STREAMY STRETTA STRIATA STRIATE
STRIGAE STROAMS STROMAL STRUMAE STRUMAS SUBPART SUMATRA SUNSTAR
SUNTRAP SURBATE SURCOAT SUTURAL SWARTHS SWARTHY SWATHER SWATTER
SWEATER SYMITAR TABARDS TABERDS TABOURS TABRETS TACKERS TAGGERS
TAGRAGS TAILERS TAILORS TAIVERS TALKERS TAMARAS TAMARIS TAMBERS
TAMBURS TAMMARS TAMPERS TANKERS TANNERS TANRECS TANTRAS TAPPERS
TAPSTER TAPSTRY TARAMAS TARANDS TARBOYS TARBUSH TARCELS TARDIES
TARGETS TARIFFS TARINGS TARMACS TARNISH TARPANS TARPONS TARRIES
TARROWS TARSALS TARSEAL TARSELS TARSIAS TARSIER TARTANS TARTARS
TARTEST TARTISH TARZANS TASERED TASKBAR TASKERS TASTERS TASTIER
TATLERS TATTERS TAVERNS TEAMERS TEARERS TEARGAS TEASERS TELLARS
TEPHRAS TERBIAS TERTIAS TESSERA TETRADS TEWARTS THAIRMS THALERS
THAWERS THENARS THIRAMS THORIAS THRALLS THRANGS THRASHY THRAVES
THREADS THREAPS THREATS THRIMSA THROATS THRYMSA THWARTS TIRADES
TIRAGES TIRASSE TOASTER TOERAGS TOOARTS TORANAS TORSADE TORULAS
TOTARAS TOWARDS TOWBARS TRACERS TRACTUS TRADERS TRADIES TRAGICS
TRAIPSE TRAMELS TRANCES TRANSES TRANSIT TRANSOM TRAPANS TRAPSED
TRAPSES TRASHED TRASHER TRASHES TRASSES TRAUMAS TRAVELS TRAVOIS
TRAYNES TREASON TREPANS TRIACTS TRIAGES TRIBALS TRICARS TRISHAW
TRISULA TROADES TROCARS TROIKAS TROJANS TRUANTS TRYSAIL TSARDOM
TSARINA TSARISM TSARIST TUGHRAS TULWARS TUNDRAS TURACOS TURBANS
TURISTA TUSHKAR TUSKARS TUSSARS TWISCAR TYRANTS TZARISM TZARIST
UNCARTS UNSMART UNSTRAP UPBRAST UPDARTS UPRATES UPSTAIR UPSTARE
UPSTART UPTEARS URTICAS VARLETS VARSITY VASTIER VATTERS VERITAS
VERSANT VESTRAL VIATORS WABSTER WAFTERS WAISTER WAITERS WANTERS
WARBOTS WARIEST WARMEST WARMIST WARMTHS WARSTLE WASTERS WASTERY
WASTREL WASTRIE WRAITHS WRASTED WRASTLE WREATHS WROATHS YANTRAS
YAOURTS YAPSTER YATTERS YTTRIAS