use '?' for JOKER (blank)

From letters Y, O, U, T, H, F, U, L, N, E, S, S, E, S  I made following words

14 letter words

youthfulnesses[23]

12 letter words

youthfulness[21]

10 letter words

foulnesses[13], usefulness[13], sensuously[13]

9 letter words

flysheets[18], flushness[15], housefuls[15], funhouses[15], syntheses[15], felstones[12], hotnesses[12], fulnesses[12], houseless[12], nuthouses[12], tenuously[12]

8 letter words

flysheet[17], honeyful[17], housefly[17], youthful[17], sheenful[14], flushest[14], houseful[14], funhouse[14], stonefly[14], honestly[14], eyeshots[14], synfuels[14], youthens[14], shuteyes[14], selfness[11], shoeless[11], felstone[11], ethnoses[11], softness[11], senseful[11], foulness[11], sulfones[11], fuseless[11], lushness[11], outfeels[11], enthuses[11], foetuses[11], unhouses[11], nuthouse[11], systoles[11], styluses[11], noseless[8], soleness[8], noteless[8], toneless[8], stenoses[8], lostness[8], selenous[8], soleuses[8], toluenes[8], tuneless[8], unsteels[8], setulose[8], sensuous[8], setulous[8]

7 letter words

thyself[16], fleshes[13], flushes[13], henleys[13], feyness[13], shyness[13], ethynes[13], eyeshot[13], honesty[13], eyefuls[13], synfuel[13], youthen[13], shuteye[13], unfussy[13], oneself[10], flenses[10], flosses[10], sloshes[10], teflons[10], ethoses[10], hostels[10], softens[10], hotness[10], hostess[10], sulfone[10], hueless[10], fulness[10], housels[10], slushes[10], teenful[10], outfeel[10], enthuse[10], foulest[10], fetuses[10], hustles[10], lushest[10], sleuths[10], tussehs[10], unhouse[10], tuneful[10], selsyns[10], slyness[10], oyesses[10], tensely[10], systole[10], toyless[10], lessens[7], loesses[7], lessons[7], sonless[7], nestles[7], netless[7], toeless[7], telsons[7], ensouls[7], useless[7], sunless[7], toluene[7], eluents[7], unsteel[7], outseen[7], outsees[7], lotuses[7], solutes[7], tousles[7], tonuses[7], tussles[7], sunsets[7], lususes[7], luteous[7], tenuous[7]

6 letter words

foehns[12], flense[9], felons[9], sheens[9], sneesh[9], hosels[9], sheols[9], noshes[9], fesses[9], fosses[9], teflon[9], fleets[9], lethes[9], helots[9], hostel[9], hotels[9], tholes[9], soften[9], ethnos[9], honest[9], sheets[9], theses[9], shotes[9], toshes[9], sloths[9], housel[9], fusees[9], fusels[9], lushes[9], houses[9], fusses[9], fluent[9], unfelt[9], flutes[9], hustle[9], leones[6], lenses[6], lessen[6], lesson[6], nesses[6], senses[6], losses[6], nestle[6], lentos[6], stolen[6], telson[6], sleets[6], steels[6], steles[6], tenses[6], setose[6], stoles[6], onsets[6], setons[6], stenos[6], stones[6], tosses[6], ensoul[6], ensues[6], unless[6], louses[6], ousels[6], soleus[6], nouses[6], onuses[6], souses[6], eluent[6], elutes[6]