use '?' for JOKER (blank)

From letters S, U, B, I, R, R, I, G, A, T, I, N, G  I made following words

13 letter words

subirrigating[17]

10 letter words

irrigating[12]

8 letter words

gigabits[12], braising[11], bruising[11], bruiting[11], bursting[11], birianis[10], triaging[10], agisting[10], gratings[10], ringgits[10], sugaring[10], urbanist[10], airburst[10], starring[9], stirring[9]

7 letter words

barging[11], garbing[11], biggins[11], gigabit[11], barring[10], birring[10], biasing[10], sabring[10], baiting[10], basting[10], burring[10], abusing[10], subring[10], antibug[10], tabuing[10], bruting[10], busting[10], tubings[10], biriani[9], garring[9], gringas[9], grigris[9], gaiting[9], grating[9], girting[9], ringgit[9], gasting[9], gatings[9], staging[9], brisant[9], arguing[9], guising[9], surging[9], gusting[9], turbans[9], inburst[9], airings[8], arising[8], raising[8], irising[8], airting[8], tarring[8], gastrin[8], gratins[8], ratings[8], staring[8], suiting[8], guitars[8], rusting[8], nutrias[7]

6 letter words

biggin[10], gibing[10], baring[9], basing[9], brings[9], bating[9], biting[9], busing[9], tubing[9], sagbut[9], gringa[8], raging[8], grigri[8], agings[8], bairns[8], brains[8], briars[8], gating[8], tibias[8], binits[8], brants[8], urging[8], rurban[8], nubias[8], airbus[8], urbias[8], burans[8], unbars[8], bruins[8], burins[8], bursar[8], rubati[8], turban[8], tabuns[8], bruits[8], brunts[8], airing[7], raring[7], grains[7], rasing[7], rising[7], siring[7], gnarrs[7], gratin[7], rating[7], taring[7], tiring[7], gainst[7], giants[7], sating[7], siting[7], gratis[7], grants[7], strang[7], string[7], unrigs[7], guitar[7], truing[7], ungirt[7], tragus[7], grunts[7], strung[7], raisin[6], isatin[6], iritis[6], instar[6], santir[6], strain[6], trains[6], ristra[6], nairus[6], uraris[6], nutria[6], aurist[6], santur[6], rutins[6]

5 letter words

bring[8], bangs[8], brags[8], garbs[8], grabs[8], brigs[8], aging[7], bairn[7], brain[7], briar[7], gigas[7], gangs[7], basin[7], nabis[7], sabin[7], raggs[7], abris[7], sabir[7], grigs[7], barns[7], brans[7], brins[7], birrs[7], tibia[7], binit[7], brant[7], baits[7], garni[6], grain[6], iring[6], gnarr[6], gains[6], signa[6], ragis[6], gnars[6], grans[6], girns[6], grins[6], rings[6], giant[6], tragi[6], grant[6], agist[6], gaits[6], staig[6], angst[6], gnats[6], stang[6], airns[5], naris[5], rains[5], ranis[5], sarin[5], arris[5], sirra[5], riant[5], train[5]