use '?' for JOKER (blank)

From letters G, L, U, T, A, R, A, L, D, E, H, Y, D, E, S  I made following words

15 letter words

glutaraldehydes[24]

14 letter words

glutaraldehyde[23]

11 letter words

slaughtered[16]

10 letter words

dehydrates[18], gesturally[14]

9 letter words

aldehydes[17], dehydrate[17], haulyards[16], hardedges[15], draughted[15], guardedly[15], gearheads[14], headgears[14], headgates[14], daughters[14], dastardly[14], gradually[14], headstall[13], slathered[13], laughters[13], slaughter[13], layerages[13], relatedly[13], steelyard[13], tegularly[13], desugared[12], graduated[12], haustella[12], thesaural[12], aureately[12], austerely[12], astraddle[11], regulated[11], graduates[11], lateraled[10], laureated[10], resaluted[10], gastrulae[10], regulates[10], laureates[9]

8 letter words

aldehyde[16], hydrated[16], shuddery[16], draughty[16], haylages[15], halyards[15], heatedly[15], lethargy[15], headstay[15], hydrates[15], haulyard[15], hardedge[14], leathery[14], gearhead[13], headgear[13], heralded[13], redheads[13], headgate[13], threaded[13], gathered[13], huddlers[13], daughter[13], draughts[13], drayages[13], yardages[13], saddlery[13], ashlared[12], ashlered[12], haltered[12], lathered[12], thralled[12], headrest[12], haulages[12], laughers[12], laughter[12], sleuthed[12], layerage[12], delayers[12], elatedly[12], sedately[12], estrayed[12], restyled[12], adultery[12], degrades[11], gradated[11], gladdest[11], hetaeras[11], trehalas[11], halteres[11], leathers[11], degusted[11], arethusa[11], allayers[11], easterly[11], astrally[11], salutary[11], laagered[10], resaddle[10], dealated[10], galeated[10], tallaged[10], galleted[10], treadled[10], desalted[10], gradates[10], restaged[10], straddle[10], treddles[10], gruelled[10], gallused[10], deluders[10], graduals[10], dullards[10], adulated[10], graduate[10], detrudes[10], gestured[10], allegers[9], dealates[9], stealage[9], gallates[9], galletas[9], tallages[9], desalter[9], reslated[9], treadles[9], agrestal[9], laureled[9], leaguers[9], duellers[9], regulate[9], adulates[9], deluster[9], lustered[9], resulted[9], gastrula[9], gestural[9], laterals[8], laureate[8], resalute[8]

7 letter words

adhered[12], redhead[12], deashed[12], daledhs[12], heddles[12], sraddha[12], shedder[12], hedgers[12], leashed[11], shelled[11], adheres[11], headers[11], hearsed[11], sheared[11], heralds[11], degrade[10], gladder[10], sledged[10], gadders[10], dredges[10], healers[10], hellers[10], sheller[10], alleged[9], lagered[9], regaled[9], deleads[9], geladas[9], dragees[9], greased[9], ladders[9], raddles[9], saddler[9], reddles[9], sledder[9], gelders[9], ledgers[9], redlegs[9], delated[9], gelated[9], legated[9], derated[9], redated[9], treaded[9], alleger[8], allseed[8], alleges[8], dealers[8], leaders[8], alegars[8], laagers[8], galeres[8], regales[8], ladlers[8], dealate[8], galeate[8], gallate[8], galleta[8], tallage[8], aerated[8]