use '?' for JOKER (blank)

From letters B, A, C, K, S, T, A, B, B, I, N, G, S  I made following words

13 letter words

backstabbings[26]

12 letter words

backstabbing[25]

9 letter words

backstabs[19], sabbatics[15]

8 letter words

backstab[18], backings[17], scabbing[15], sackings[15], stacking[15], banksias[14], sabbatic[14], katcinas[14], stabbing[13], skatings[13], bisnagas[11], bastings[11], castings[11], abstains[10], assignat[9]

7 letter words

backbit[17], backing[16], cabbing[14], bakings[14], basking[14], casking[14], sacking[14], tacking[14], kitbags[14], banksia[13], katcina[13], bankits[13], anticks[13], catkins[13], sabbing[12], askings[12], gaskins[12], tabbing[12], skating[12], staking[12], takings[12], tasking[12], sabbats[11], abasing[10], bisnaga[10], casings[10], abating[10], agnatic[10], basting[10], actings[10], casting[10], cassina[9], abstain[9], satanic[9], casitas[9], against[8], antisag[8], satangs[8]

6 letter words

babkas[14], kababs[14], baking[13], caking[13], kitbag[13], snacks[12], snicks[12], bankit[12], antick[12], catkin[12], batiks[12], stacks[12], sticks[12], asking[11], gaskin[11], kiangs[11], taking[11], tsking[11], cabins[10], basics[10], sabbat[10], tabbis[10], askant[10], tankas[10], takins[10], stanks[10], stinks[10], baaing[9], basing[9], casing[9], bagass[9], bating[9], acting[9], cassia[8], basins[8], sabins[8], abatis[8], casita[8], sancta[8], actins[8], antics[8], nastic[8], scants[8], saigas[7], sangas[7], assign[7], agitas[7], taigas[7], satang[7], gainst[7], giants[7], sating[7], agists[7], staigs[7], angsts[7], stangs[7], stings[7], saints[6], satins[6], stains[6]

5 letter words

babka[13], kabab[13], aback[13], backs[13], bibbs[11], banks[11], snack[11], nicks[11], snick[11], basks[11], casks[11], sacks[11], bisks[11], sicks[11], batik[11], stack[11], tacks[11], stick[11], ticks[11], kiang[10], ginks[10], kings[10], skags[10], abaci[9], cabin[9], abbas[9], babas[9], basic[9], kanas[9], kains[9], kinas[9], scabs[9], sibbs[9], sakis[9], sikas[9], sinks[9], skins[9], tanka[9], takin[9], katas[9], takas[9], ikats[9], acing[8], bangs[8], scags[8], basin[7], nabis[7], sabin[7], cains[7], casas[7], basis[7], bassi[7], isbas[7], scans[7], snibs[7], actin[7], antic[7], baits[7], canst[7], cants[7], scant[7], again[6], saiga[6], angas[6], sanga[6], gains[6], signa[6], sagas[6], snags[6], signs[6], sings[6], agita[6], taiga[6], tanga[6], giant[6], agist[6], gaits[6], staig[6], angst[6], assai[5], sains[5], sasin[5], antas[5]