use '?' for JOKER (blank)

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

13 letter words

backscattered[24]

11 letter words

backscatter[21]

10 letter words

backstreet[18], reattacked[17], abstracted[15]

9 letter words

bracketed[18], backdates[18], restacked[16], caretakes[15], attackers[15], reattacks[15], abreacted[14], acerbated[14], acerbates[13], bracteate[13], cabrettas[13], trabeated[12], castrated[12], scattered[12]

8 letter words

backcast[18], scatback[18], backdate[17], backseat[16], seatback[16], backrest[16], brackets[16], screaked[15], baccated[15], racketed[15], retacked[15], casketed[15], attacked[15], caretake[14], teacakes[14], attacker[14], reattack[14], cardcase[13], acceders[13], accreted[13], streaked[13], acerbate[12], abreacts[12], bearcats[12], cabarets[12], cabresta[12], acerbest[12], accretes[12], cabretta[12], abstract[12], acerated[11], caseated[11], cadaster[11], cadastre[11], breasted[11], debaters[11], acetated[11], battered[11], detracts[11], trabeate[10], acetates[10], tabarets[10], castrate[10], teacarts[10], abetters[10], berettas[10], restated[9], retasted[9], stearate[8]

7 letter words

cracked[16], bedecks[16], caracks[15], backers[15], rebecks[15], bracket[15], backset[15], setback[15], beckets[15], beraked[14], creaked[14], debeaks[14], debarks[14], dackers[14], deckers[14], tracked[14], stacked[14], arabesk[13], beakers[13], berakes[13], baccate[13], teacake[13], betakes[13], taskbar[13], rackets[13], restack[13], retacks[13], stacker[13], tackers[13], attacks[13], tackets[13], acceder[12], cascade[12], saccade[12], accedes[12], dekares[12], bracted[12], darkest[12], straked[12], carcase[11], abreact[11], bearcat[11], cabaret[11], accrete[11], saccate[11], karates[11], retakes[11], abrades[10], arcades[10], ascared[10], beaders[10], debaser[10], sabered[10], creased[10], decares[10], berated[10], debater[10], rebated[10], tabered[10], catered[10], cerated[10], created[10], reacted[10], bestead[10], debates[10], bastard[10], tabards[10], dabster[10], redacts[10], scarted[10], crested[10], abetted[10], detract[10], scatted[10], detects[10], acerate[9], caseate[9], abaters[9], abreast[9], carates[9], beaters[9], berates[9], rebates[9], cerates[9], creates[9], ecartes[9], acetate[9], tabaret[9], teacart[9], abetter[9], beretta[9], casette[9], batters[9], scatter[9], betters[9], tercets[9], aerated[8], dearest[8], derates[8], redates[8], sedater[8], treated[8], estated[8], started[8], tetrads[8], aerates[7], estreat[7], restate[7], retaste[7]

6 letter words

backed[15], becked[15], bedeck[15], carack[14], backer[14], beaked[13], debeak[13], barked[13], braked[13], debark[13], arcked[13], carked[13], dacker[13], racked[13], baccae[12], beaker[12], berake[12], accede[11], braced[11], abrade[9], arcade[9], beader[9], decare[9]