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From letters C, H, I, L, L, N, E, S, S, E, S  I made following words

11 letter words

chillnesses[16]

9 letter words

chenilles[14], chillness[14], illnesses[9]

8 letter words

chenille[13], chinless[13], licenses[10], silences[10], lineless[8], isleless[8], lensless[8]

7 letter words

elenchi[12], helices[12], lichees[12], lichens[12], seiches[12], chisels[12], chesses[12], license[9], selenic[9], silence[9], iceless[9], nellies[7], enisles[7], ensiles[7], seniles[7], illness[7], sessile[7], senseis[7], lessens[7], sinless[7]

6 letter words

lichee[11], lichen[11], seiche[11], leches[11], chiels[11], chiles[11], chisel[11], liches[11], chills[11], chines[11], inches[11], niches[11], shiels[9], shells[9], shills[9], sheens[9], sneesh[9], shines[9], hisses[9], nieces[8], clines[8], ecesis[8], slices[8], censes[8], scenes[8], cesses[8], nellie[6], enisle[6], ensile[6], senile[6], selles[6], lisles[6], seines[6], sensei[6], lenses[6], lessen[6], snells[6], seises[6], nesses[6], senses[6]

5 letter words

leech[10], chiel[10], chile[10], chill[10], hence[10], chine[10], niche[10], eches[10], chins[10], chess[10], heels[8], heils[8], shiel[8], hells[8], shell[8], hills[8], shill[8], sheen[8], shine[8], shies[8], shins[8], sinhs[8], celli[7], niece[7], cline[7], ceils[7], slice[7], cells[7], cense[7], scene[7], cines[7], since[7], sices[7], selle[5], lisle[5], seine[5], lenes[5], lense[5], lenis[5], liens[5], lines[5], snell[5], nills[5], seise[5], leses[5], seels[5], isles[5], sells[5], sills[5], esnes[5], sense[5], sines[5], esses[5], sises[5]

4 letter words

eche[9], lech[9], lich[9], chin[9], inch[9], chis[9], ichs[9], heel[7], elhi[7], heil[7], hell[7], hill[7], hies[7], hens[7], hins[7], hisn[7], shin[7], sinh[7], shes[7], hiss[7], ceil[6], lice[6], cell[6], cine[6], nice[6], cees[6], ices[6], sice[6], cels[6], cess[6], secs[6], sics[6], lien[4], line[4], nill[4], eels[4], else[4], lees[4], seel[4], isle[4], leis[4], lies[4], ells[4], sell[4], ills[4], sill[4], esne[4], seen[4], sene[4], sine[4], lens[4], lins[4], nils[4], eses[4], sees[4], seis[4], less[4], sels[4], ness[4], sins[4]

3 letter words

chi[8], hic[8], ich[8], hie[6], hen[6], cee[5], ice[5], cel[5], eel[3], lee[3], lei[3], lie[3], ell[3], ill[3], nee[3]