use '?' for JOKER (blank)

From letters A, B, S, T, R, A, C, T, E, R  I made following words

10 letter words

abstracter[14]

9 letter words

cabrettas[13], castrater[11]

8 letter words

abreacts[12], bearcats[12], cabarets[12], cabresta[12], cabretta[12], abstract[12], tabarets[10], castrate[10], teacarts[10], retracts[10]

7 letter words

bracers[11], abreact[11], bearcat[11], cabaret[11], abaters[9], abreast[9], carates[9], barrets[9], barters[9], carters[9], craters[9], tracers[9], tabaret[9], teacart[9], retract[9], batters[9], scatter[9], erratas[7], tartare[7], tartars[7], ratters[7], restart[7], starter[7]

6 letter words

bracer[10], barcas[10], scarab[10], braces[10], cabers[10], bracts[10], abaser[8], arecas[8], caesar[8], barres[8], rebars[8], carers[8], racers[8], scarer[8], abater[8], carate[8], barret[8], barter[8], carter[8], crater[8], tracer[8], abates[8], rabats[8], carats[8], barest[8], baster[8], breast[8], tabers[8], carets[8], cartes[8], caster[8], caters[8], crates[8], reacts[8], recast[8], traces[8], batter[8], bettas[8], stacte[8], tracts[8], errata[6], reatas[6], arrest[6], rarest[6], raster[6], raters[6], starer[6], tarres[6], terras[6], tartar[6], ratter[6], tarter[6], attars[6], strata[6], tatars[6], stater[6], taster[6], taters[6], tetras[6], treats[6]

5 letter words

barca[9], acerb[9], brace[9], caber[9], carbs[9], crabs[9], bract[9], areca[7], barer[7], barre[7], rebar[7], carer[7], racer[7], abase[7], sabra[7], sacra[7], bares[7], baser[7], bears[7], braes[7], saber[7], sabre[7], acres[7], cares[7], carse[7], escar[7], races[7], scare[7], serac[7], carrs[7], abate[7], aceta[7], rabat[7], carat[7], taber[7], caret[7], carte[7], cater[7], crate[7], react[7], recta[7], trace[7], abets[7], baste[7], bates[7], beast[7], beats[7], betas[7], tabes[7], caste[7], cates[7], cesta[7], taces[7], brats[7], carts[7], scart[7], crest[7], betta[7], tacet[7], tecta[7], tract[7], batts[7], scatt[7], tacts[7], areas[5], arras[5], rares[5], raser[5], rears[5], reata[5], rater[5], tarre[5], terra[5], aster[5], rates[5], resat[5], stare[5], tares[5], tears[5], attar[5], tatar[5], tater[5], tetra[5], treat[5], state[5], taste[5], tates[5], teats[5], testa[5], start[5], tarts[5], trets[5]

4 letter words

carb[8], crab[8], bare[6], bear[6], brae[6], acre[6], care[6], race[6], carr[6], area[4], rare[4], rear[4]