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From letters Y, O, U, N, G, L, I, N, G, S  I made following words

10 letter words

younglings[15]

9 letter words

youngling[14]

8 letter words

longings[10], lounging[10]

7 letter words

soggily[12], lungyis[11], sunnily[10], unnoisy[10], longing[9], gosling[9], noggins[9], lunging[9], unsling[8], lousing[8]

6 letter words

niggly[11], guying[11], lyings[10], lysing[10], singly[10], yogins[10], lungyi[10], loungy[10], snugly[10], youngs[10], nosily[9], nonyls[9], nylons[9], ogling[8], noggin[8], goings[8], gluing[8], luging[8], logins[7], losing[7], soling[7], nosing[7], lungis[7], sluing[7], gluons[7], insoul[6], unions[6], unison[6]

5 letter words

loggy[10], soggy[10], lingy[9], lying[9], ginny[9], yogin[9], yogis[9], gunny[9], young[9], noily[8], nonyl[8], nylon[8], lysin[8], noisy[8], yonis[8], sonly[8], sonny[8], sunny[8], lousy[8], going[7], gongs[7], noggs[7], glugs[7], lingo[6], login[6], lings[6], sling[6], longs[6], lungi[6], gluon[6], iglus[6], suing[6], using[6], lungs[6], slung[6], linns[5], linos[5], lions[5], loins[5], noils[5], union[5], louis[5], nouns[5]

4 letter words

yogi[8], logy[8], goys[8], ugly[8], guys[8], inly[7], liny[7], oily[7], yoni[7], only[7], syli[7], yins[7], nosy[7], luny[7], yous[7], gong[6], nogg[6], gigs[6], iggs[6], glug[6], ling[5], long[5], gins[5], sign[5], sing[5], logs[5], slog[5], nogs[5], snog[5], song[5], iglu[5], lung[5], guls[5], lugs[5], slug[5], gnus[5], guns[5], snug[5], sung[5], linn[4], lino[4], lion[4], loin[4], noil[4], lins[4], nils[4], inns[4], oils[4], silo[4], soil[4], soli[4], ions[4], noun[4], nuns[4], sunn[4], soul[4], nous[4], onus[4]

3 letter words

goy[7], guy[7], yin[6], yon[6], sly[6], syn[6], soy[6], you[6], gig[5], igg[5], gin[4], log[4], nog[4], gos[4], gul[4], lug[4], gnu[4], gun[4], lin[3], nil[3], inn[3], oil[3], ion[3], lis[3], ins[3], sin[3], sol[3], nos[3], ons[3], son[3], nun[3], nus[3], sun[3], uns[3], sou[3]

2 letter words

oy[5], yo[5], go[3], li[2], in[2], oi[2], lo[2], no[2], on[2], is[2], si[2], os[2], so[2], nu[2], un[2], us[2]