use '?' for JOKER (blank)

From letters S, C, O, U, R, I, N, G  I made following words

8 letter words

coursing[11], scouring[11], sourcing[11]

7 letter words

scoring[10], congius[10], cursing[10], rousing[8], souring[8]

6 letter words

coring[9], coigns[9], cosign[9], incogs[9], corgis[9], curing[9], orcins[8], cousin[8], incurs[8], curios[8], cornus[8], girons[7], grison[7], groins[7], rosing[7], signor[7], soring[7], unrigs[7], guiros[7]

5 letter words

coign[8], incog[8], corgi[8], orgic[8], cuing[8], orcin[7], cions[7], coins[7], icons[7], scion[7], sonic[7], coirs[7], corns[7], scorn[7], incur[7], runic[7], curio[7], cornu[7], incus[7], conus[7], uncos[7], curns[7], scour[7], giron[6], groin[6], girns[6], grins[6], rings[6], giros[6], ruing[6], unrig[6], guiro[6], suing[6], using[6], rungs[6], irons[5], noirs[5], noris[5], ornis[5], rosin[5], ruins[5]

4 letter words

cigs[7], cogs[7], cion[6], coin[6], coni[6], icon[6], coir[6], corn[6], cons[6], cris[6], cors[6], orcs[6], rocs[6], unci[6], unco[6], uric[6], curn[6], crus[6], curs[6], girn[5], grin[5], ring[5], giro[5], gins[5], sign[5], sing[5], nogs[5], snog[5], song[5], rigs[5], rung[5], gnus[5], guns[5], snug[5], sung[5], rugs[5], inro[4], iron[4], noir[4], nori[4], ions[4], rins[4], sori[4], sorn[4], ruin[4], nous[4], onus[4], runs[4], urns[4], ours[4], sour[4]

3 letter words

cig[6], cog[6], con[5], cor[5], orc[5], roc[5], cis[5], sic[5], cos[5], cru[5], cur[5], gin[4], nog[4], rig[4], gor[4], gos[4], gnu[4], gun[4], rug[4], ion[3], rin[3], nor[3], ins[3], sin[3], nos[3], ons[3], son[3], sir[3], sri[3], ors[3], run[3], urn[3], our[3], nus[3], sun[3], uns[3], sou[3]

2 letter words

go[3], in[2], oi[2], no[2], on[2], or[2], is[2], si[2], os[2], so[2], nu[2], un[2], us[2]