use '?' for JOKER (blank)

From letters B, A, C, K, B, O, N, E, D  I made following words

9 letter words

backboned[20]

8 letter words

backbend[19], backbone[18]

7 letter words

knobbed[16]

6 letter words

backed[15], beckon[14], cabbed[13], banked[13], bonked[13], conked[13], nocked[13], nabbed[11], beacon[10], acnode[9], canoed[9], deacon[9]

5 letter words

kebab[13], kabob[13], kebob[13], baked[12], caked[12], coked[12], cabob[11], knead[10], naked[10], kendo[10], nabob[9], bacon[9], banco[9], oaken[9], baned[8], acned[8], caned[8], dance[8], abode[8], adobe[8], boned[8], coden[8], coned[8], beano[7], canoe[7], ocean[7], anode[6]

4 letter words

back[12], beck[12], bock[12], deck[11], dock[11], bake[10], beak[10], cake[10], bank[10], neck[10], cobb[10], coke[10], bonk[10], knob[10], conk[10], nock[10], dank[9], abbe[8], babe[8], kane[8], kaon[8], koan[8], keno[8], abed[7], bade[7], bead[7], aced[7], cade[7], dace[7], band[7], bend[7], coda[7], bode[7], code[7], coed[7], deco[7], bond[7], bane[6], bean[6], nabe[6], acne[6], cane[6], bone[6], ebon[6], cone[6], once[6], dean[5], odea[5], dona[5], done[5], node[5], aeon[4]

3 letter words

kab[9], kob[9], dak[8], cab[7], ebb[7], kae[7], kea[7], ken[7], bob[7], cob[7], koa[7], oak[7], oka[7], oke[7], bad[6], dab[6], cad[6], bed[6], deb[6], bod[6], cod[6], doc[6], ace[5], ban[5], nab[5], can[5], ben[5], neb[5], abo[5], boa[5], oba[5], oca[5], obe[5], nob[5], con[5], and[4], dan[4], den[4], end[4], ado[4], oda[4], doe[4], ode[4], don[4], nod[4], ane[3], nae[3], eon[3], one[3]

2 letter words

ka[6], ab[4], ba[4], be[4], bo[4], ad[3], de[3], ed[3], do[3], od[3], ae[2], an[2], na[2], en[2], ne[2], oe[2], no[2], on[2]