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From letters I, N, D, I, G, E, N, T, S  I made following words

9 letter words

destining[11], indigents[11]

8 letter words

indigens[10], enditing[10], indigent[10], dingiest[10], ginniest[9]

7 letter words

indigen[9], dingies[9], endings[9], sending[9], dieting[9], editing[9], ignited[9], denting[9], tending[9], dinting[9], nidgets[9], tidings[9], insigne[8], seining[8], indites[8], tineids[8], ignites[8], dentins[8], indents[8], intends[8], nesting[8], tensing[8], intines[7]

6 letter words

dieing[8], ending[8], ginned[8], dining[8], indign[8], niding[8], deigns[8], design[8], dinges[8], signed[8], singed[8], siding[8], nidget[8], tinged[8], tiding[8], digest[8], digits[8], indies[7], inside[7], sinned[7], ensign[7], indite[7], tineid[7], ignite[7], tieing[7], dentin[7], indent[7], intend[7], tinned[7], tining[7], teiids[7], tidies[7], teinds[7], ingest[7], signet[7], tinges[7], siting[7], intine[6], seniti[6], sennit[6], tennis[6]

5 letter words

deign[7], dinge[7], dings[7], digit[7], indie[6], genii[6], inned[6], dines[6], nides[6], snide[6], segni[6], sengi[6], singe[6], teiid[6], teind[6], tined[6], tinge[6], nitid[6], deist[6], diets[6], dites[6], edits[6], sited[6], stied[6], tides[6], gites[6], dents[6], tends[6], gents[6], dints[6], sting[6], tings[6], nisei[5], nines[5], inset[5], neist[5], nites[5], senti[5], stein[5], tines[5], intis[5]

4 letter words

gied[6], ding[6], geds[6], digs[6], gids[6], deni[5], dine[5], nide[5], gien[5], nidi[5], dies[5], ides[5], side[5], egis[5], gies[5], dens[5], ends[5], send[5], sned[5], engs[5], gens[5], negs[5], dins[5], gins[5], sign[5], sing[5], diet[5], dite[5], edit[5], tide[5], tied[5], gite[5], dent[5], tend[5], gent[5], dint[5], ting[5], teds[5], gest[5], gets[5], tegs[5], dits[5], gist[5], gits[5], nine[4], sine[4], nisi[4], inns[4], nite[4], tine[4], inti[4], site[4], ties[4], nest[4], nets[4], sent[4], tens[4], nits[4], snit[4], tins[4]

3 letter words

ged[5], dig[5], gid[5], die[4], gie[4], den[4], end[4], eng[4], gen[4], neg[4], din[4], gin[4], eds[4], seg[4], dis[4], ids[4], ted[4], get[4], teg[4], dit[4], git[4], inn[3], sei[3], ens[3], sen[3], ins[3], sin[3], tie[3]