use '?' for JOKER (blank)

From letters I, N, T, R, O, G, R, E, S, S, A, N, T, S  I made following words

14 letter words

introgressants[15]

13 letter words

transgression[14], introgressant[14]

11 letter words

reassorting[12], integrators[12], astringents[12], registrants[12], nonstarters[11], transistors[11]

10 letter words

reasonings[11], organisers[11], seasonings[11], interorgan[11], resonating[11], gannisters[11], ringtosses[11], transgress[11], integrator[11], negotiants[11], astringent[11], integrants[11], registrant[11], restarting[11], gestations[11], serrations[10], sensations[10], assertions[10], stentorian[10], nonstarter[10], transients[10], restations[10], stationers[10], nonartists[10], strontians[10], restraints[10], traitoress[10], transistor[10], snottiness[10], antistress[10], resistants[10], straitness[10]

9 letter words

reasoning[10], organiser[10], seasoning[10], angriness[10], ranginess[10], organises[10], garrisons[10], assigners[10], reassigns[10], assignors[10], negations[10], gannister[10], orangiest[10], negatrons[10], nitrogens[10], arresting[10], serrating[10], resorting[10], restoring[10], assenting[10], sensating[10], tanginess[10], agonistes[10], asserting[10], astringes[10], ganisters[10], estragons[10], assorting[10], organists[10], strangers[10], restrings[10], stringers[10], staginess[10], grassiest[10], stressing[10], songsters[10], negotiant[10], integrant[10], nattering[10], rattening[10], nontarget[10], attorning[10], retorting[10], gestation[10], restating[10], retasting[10], stringent[10], tetragons[10], garotters[10], garrottes[10], strangest[10], strongest[10], insnarers[9], sorriness[9], anointers[9], reanoints[9], serration[9], sensation[9], assertion[9], senoritas[9], resonants[9], restrains[9], strainers[9], tarriness[9], antsiness[9], nastiness[9], stoniness[9], artsiness[9], assentors[9], starnoses[9], arsonists[9], sternsons[9], assertors[9], assorters[9], reassorts[9], resistors[9], intonates[9], instanter[9], intranets[9], transient[9], restation[9], stationer[9], nonartist[9], strontian[9], restraint[9], retirants[9], nitrators[9], nattiness[9], stannites[9], tinstones[9], resistant[9], straitens[9], tartiness[9], strontias[9], tenorists[9], starriest[9], traitress[9], tastiness[9]

8 letter words

orangier[9], anginose[9], aginners[9], earnings[9], engrains[9], grannies[9], organise[9], negronis[9], earrings[9], grainers[9], grinners[9], groaners[9], garrison[9], roarings[9], ignorers[9], agonises[9], assigner[9], reassign[9], seringas[9], argosies[9], assignor[9], signoras[9], soarings[9], goriness[9], grassier[9], grossers[9], negation[9], negatron[9], ignorant[9], nitrogen[9], antigens[9], gentians[9], negatons[9], tonnages[9], angriest[9], astringe[9], ganister[9], gantries[9], granites[9], ingrates[9], rangiest[9], estragon[9], negators[9], raisonne[8], insnarer[8], insnares[8], erasions[8], sensoria[8], ironness[8], rosaries[8], serranos[8], nosiness[8], rosiness[8], anointer[8], reanoint[8], inerrant[8], anterior[8], enations[8], sonatine[8], entrains[8], trannies[8]