use '?' for JOKER (blank)

From letters K, N, U, C, K, L, E, B, A, L, L, E, R, S  I made following words

14 letter words

knuckleballers[26]

13 letter words

knuckleballer[25]

12 letter words

knuckleballs[24]

11 letter words

knuckleball[23]

10 letter words

blackeners[18], cubanelles[14], censurable[14], unsellable[12]

9 letter words

breakneck[21], knucklers[19], blackener[17], bullnecks[17], slackener[15], bullsnake[15], cubanelle[13], brucellae[13], rescuable[13], securable[13], brucellas[13], subcellar[13], labellers[11], cellulase[11], cellulars[11], ceruleans[11]

8 letter words

knackers[18], knuckler[18], knuckles[18], blackens[16], brackens[16], bullneck[16], buckeens[16], bucklers[16], subclerk[16], runbacks[16], crankles[14], caulkers[14], unbrakes[14], clunkers[14], brucella[12], bullaces[12], arbuscle[12], unbraces[12], labeller[10], sellable[10], nacelles[10], labelers[10], relabels[10], enablers[10], cleaners[10], cleanser[10], recleans[10], cellular[10], cerulean[10], nucellar[10], cellules[10], nuclease[10], reusable[10], rubellas[10], lucarnes[10], lucernes[10], sullener[8]

7 letter words

knacker[17], keckles[17], knuckle[17], blacken[15], blacker[15], bracken[15], backers[15], rebecks[15], krakens[15], skanker[15], buckeen[15], buckler[15], runback[15], buckles[15], sunback[15], buckras[15], buckers[15], skulker[15], bleaker[13], blanker[13], crankle[13], slacken[13], beakers[13], berakes[13], balkers[13], calkers[13], lackers[13], slacker[13], bankers[13], cankers[13], snacker[13], neckers[13], caulker[13], unbrake[13], clunker[13], uncakes[13], rebukes[13], burlesk[13], ruckles[13], sculker[13], suckler[13], bunkers[13], absence[11], alkenes[11], cablers[11], leakers[11], sneaker[11], rankles[11], kernels[11], bullace[11], curable[11], unbrace[11], because[11], bascule[11], subcell[11], subclan[11], rubaces[11], subrace[11], becurse[11], lunkers[11], runkles[11], nacelle[9], labeler[9], relabel[9], enabler[9], cleaner[9], reclean[9], callees[9], baleens[9], enables[9], cleanse[9], enlaces[9], scalene[9], cereals[9], relaces[9], rescale[9], sclerae[9], ballers[9], callers[9], cellars[9], recalls[9], scleral[9], careens[9], caserne[9], recanes[9], lancers[9], crenels[9], cellule[9], nebulae[9], nucleal[9], rubella[9], rulable[9], nebular[9], lucarne[9], nuclear[9], unclear[9], lucerne[9], useable[9], euclase[9], nebulas[9], unbales[9], censual[9], lacunes[9], launces[9], unlaces[9], cesurae[9], recusal[9], secular[9], recluse[9], cullers[9], sculler[9], unbears[9], censure[9], slurban[9], lucerns[9], alleles[7], leaners[7], sneller[7], allures[7], laurels[7], lullers[7], unreels[7]

6 letter words

keckle[16], backer[14], rebeck[14], beaker[12], berake[12], balker[12], calker[12], alkene[10], cabler[10], callee[8], cellae[8], baleen[8], enable[8], enlace[8], cereal[8], relace[8], allele[6]