use '?' for JOKER (blank)

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

13 letter words

backcountries[23]

11 letter words

buccinators[17], obscurantic[17]

10 letter words

backcourts[20], outbackers[18], suboceanic[16], buccinator[16], accretions[14], anorectics[14], incubators[14], keratinous[14], ketonurias[14], cautioners[12], cointreaus[12], recautions[12]

9 letter words

crabstick[19], backcourt[19], rockabies[17], corncakes[17], boatnecks[17], outbacker[17], conscribe[15], crankiest[15], croakiest[15], keratosic[15], unacerbic[15], cankerous[15], subarctic[15], scorbutic[15], breakouts[15], outbreaks[15], arccosine[13], cocineras[13], accretion[13], anorectic[13], oscitance[13], bacterins[13], boracites[13], accentors[13], narcotics[13], cancerous[13], urokinase[13], centauric[13], incubator[13], ketonuria[13], incubates[13], encaustic[13], succinate[13], bounciest[13], cinctures[13], accouters[13], accoutres[13], coruscate[13], obscurant[13], coruscant[13], curbstone[13], baritones[11], obtainers[11], reobtains[11], taborines[11], actioners[11], anoretics[11], creations[11], reactions[11], autocrine[11], cautioner[11], cointreau[11], recaution[11], isobutane[11], tenacious[11], antibuser[11], braunites[11], urbanites[11], truancies[11], courantes[11], courtesan[11], nectarous[11], outrances[11], suctorian[11], countries[11], cretinous[11], neurotics[11]

8 letter words

corncake[16], brackens[16], boatneck[16], tiebacks[16], cockiest[16], backrest[16], brackets[16], crickets[16], stockcar[16], brockets[16], crockets[16], runbacks[16], roebucks[16], cocksure[16], carbonic[14], breccias[14], bearskin[14], ascorbic[14], antirock[14], beatniks[14], snakebit[14], steinbok[14], barkiest[14], brakiest[14], crankest[14], stricken[14], reitboks[14], corkiest[14], rockiest[14], stockier[14], unbrakes[14], unsicker[14], crankous[14], cocinera[12], cocaines[12], brisance[12], carbines[12], aerobics[12], corbinas[12], bicornes[12], conciser[12], cornices[12], croceins[12], acetonic[12], bacterin[12], acentric[12], boracite[12], accentor[12], cratonic[12], narcotic[12], concerti[12], necrotic[12], cabinets[12], iceboats[12], coenacts[12], cosecant[12], conceits[12], keratins[12], cabestro[12], cabresto[12], ectosarc[12], acrostic[12], bisector[12], cortices[12], concerts[12], instroke[12], bouncier[12], subocean[12], caesuric[12], curacies[12], unbraces[12], crucians[12], brucines[12], caribous[12], bouncers[12], incubate[12], cuneatic[12], baronies[10], searobin[10], scenario[10], baritone[10], obtainer[10], reobtain[10], taborine[10], actioner[10], anoretic[10], creation[10], reaction[10], botanies[10], botanise[10], niobates[10], obeisant[10], aconites[10], canoeist[10], sonicate[10], banister[10], barniest[10], canister[10], ceratins[10], cisterna[10], creatins[10], scantier[10], tacrines[10], baronets[10], ancestor[10], enactors[10], taborins[10], carotins[10], cortinas[10], bornites[10], cointers[10], corniest[10], noticers[10], urbanise[10], nacreous[10], coinsure[10], notaries[8], senorita[8]