use '?' for JOKER (blank)

From letters Y, E, S, T, E, R, N, I, G, H, T, S  I made following words

12 letter words

yesternights[19]

11 letter words

yesternight[18]

10 letter words

retightens[14], tighteners[14], eyestrings[14]

9 letter words

eyesights[16], sheetings[13], sightseen[13], sightseer[13], rightness[13], retighten[13], tethering[13], tightener[13], teethings[13], tightness[13], strengths[13], synergies[13], synergist[13], thirteens[12], resetting[10], retesting[10], grisettes[10], insetters[9], interests[9], sternites[9], triteness[9]

8 letter words

hygienes[15], greyhens[15], eyesight[15], hygeists[15], greenish[12], rehinges[12], sheering[12], seething[12], sheeting[12], greenths[12], sightsee[12], resights[12], sighters[12], teething[12], tightens[12], rightest[12], strength[12], greyness[12], syringes[12], trysting[12], reshines[11], heisters[11], thirteen[11], serenity[11], syenites[11], styrenes[11], entirety[11], eternity[11], syrettes[11], greisens[9], gentries[9], integers[9], reesting[9], steering[9], stingers[9], trigness[9], grisette[9], tergites[9], gitterns[9], settings[9], sentries[8], insetter[8], interest[8], sternite[8], trientes[8], sternest[8], stinters[8]

7 letter words

hygiene[14], greyhen[14], greyish[14], hygeist[14], tything[14], ethynes[13], shyster[13], thyrses[13], thirsty[13], rehinge[11], hingers[11], girshes[11], sighers[11], greenth[11], nighest[11], resight[11], sighter[11], tighten[11], tighter[11], gyrenes[11], syringe[11], yessing[11], geysers[11], retying[11], greyest[11], stringy[11], henries[10], inheres[10], reshine[10], heiress[10], shiners[10], shrines[10], neither[10], therein[10], theines[10], heister[10], hinters[10], hessite[10], sithens[10], tethers[10], hitters[10], tithers[10], theists[10], thirsts[10], syenite[10], styrene[10], yestern[10], teentsy[10], tensity[10], syrette[10], trystes[10], greisen[8], genesis[8], seeings[8], signees[8], ingress[8], resigns[8], signers[8], singers[8], integer[8], treeing[8], gerents[8], regents[8], resting[8], stinger[8], ingests[8], signets[8], tigress[8], strings[8], tergite[8], gittern[8], retting[8], setting[8], testing[8], getters[8], seiners[7], sereins[7], serines[7], entires[7], entries[7], retines[7], trienes[7], sestine[7], resites[7], nesters[7], renests[7], resents[7], estrins[7], inserts[7], sinters[7], nettier[7], tentier[7], testier[7], netters[7], tenters[7], retints[7], stinter[7], tinters[7], tensest[7], retests[7], setters[7], streets[7], tersest[7], testers[7], sitters[7]

6 letter words

hinger[10], nigher[10], henges[10], hinges[10], neighs[10], sigher[10], herein[9], inhere[9], hirees[9], genies[7], seeing[7], signee[7], genres[7], greens[7], reigns[7], renigs[7], resign[7], sering[7], nereis[6], seiner[6], serein[6], serine[6]