use '?' for JOKER (blank)

From letters E, N, D, O, S, K, E, L, E, T, O, N  I made following words

12 letter words

endoskeleton[17]

9 letter words

lodestone[10]

8 letter words

kenneled[13], sklented[13], skeleton[12], loosened[9], endnotes[9], sonneted[9]

7 letter words

kneeled[12], sleeked[12], nonsked[12], snooked[12], tokened[12], steeked[12], stooked[12], sleeken[11], kennels[11], keelson[11], keenest[11], ketenes[11], ketones[11], nektons[11], needles[8], donnees[8], doolees[8], noodles[8], snooled[8], endnote[8], tenoned[8], deletes[8], sleeted[8], steeled[8], nestled[8], denotes[8], tendons[8], stooled[8], toledos[8], snooted[8], stelene[7]

6 letter words

keeled[11], keened[11], kenned[11], looked[11], kendos[11], stoked[11], kennel[10], kneels[10], kelson[10], ketene[10], ketone[10], nekton[10], kentes[10], sklent[10], ketose[10], ketols[10], tokens[10], needle[7], donnee[7], neoned[7], doolee[7], noodle[7], seeled[7], lensed[7], donees[7], lodens[7], loosed[7], oodles[7], soloed[7], nodose[7], noosed[7], odeons[7], delete[7], denote[7], tendon[7], looted[7], toledo[7], tooled[7], eldest[7], nested[7], tensed[7], oldest[7], stoled[7], stoned[7], sooted[7], tondos[7], leones[6], nelson[6], loosen[6], lenten[6], nestle[6], sennet[6], lentos[6], stolen[6], telson[6], nonets[6], sonnet[6], tenons[6], tonnes[6], stolon[6]

5 letter words

kneed[10], kendo[10], dekes[10], skeed[10], toked[10], tsked[10], kneel[9], keels[9], leeks[9], sleek[9], keens[9], knees[9], skeen[9], skene[9], koels[9], kenos[9], kolos[9], looks[9], sokol[9], nooks[9], snook[9], kente[9], knelt[9], ketol[9], token[9], keets[9], skeet[9], steek[9], kelts[9], stoke[9], tokes[9], donee[6], loden[6], olden[6], donne[6], looed[6], odeon[6], deles[6], denes[6], dense[6], needs[6], lends[6], doles[6], lodes[6], soled[6], nodes[6], nosed[6], sonde[6], soldo[6], snood[6], toled[6], noted[6], toned[6], tondo[6], deets[6], steed[6], delts[6], dents[6], tends[6], doest[6], dotes[6], dolts[6], leone[5], lenes[5], lense[5], nenes[5], enols[5], lenos[5], noels[5], neons[5], nones[5], loose[5], oleos[5], noose[5], loons[5], nolos[5], snool[5], solon[5], noons[5], lento[5], nonet[5], tenon[5], tonne[5], leets[5], sleet[5], steel[5], stele[5], teels[5], teles[5], sente[5], teens[5], tense[5], stole[5], telos[5], toles[5], notes[5], onset[5], seton[5], steno[5], stone[5], tones[5]