use '?' for JOKER (blank)

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

14 letter words

intransigeants[15]

13 letter words

intransigeant[14], intransigents[14]

12 letter words

intransigent[13]

11 letter words

reattaining[12], ingratiates[12], reinstating[12], straitening[12], sagittaries[12], astringents[12]

10 letter words

graininess[11], entraining[11], resinating[11], gannisters[11], ingratiate[11], intreating[11], sanitating[11], tetanising[11], astringent[11], integrants[11], intrigants[11], transiting[11], instigates[11], grittiness[11], resittings[11], stringiest[11], sanitaries[10], stannaries[10], itinerants[10], tearstains[10], tanistries[10], transients[10], internists[10]

9 letter words

arginines[10], ensnaring[10], insnaring[10], arginases[10], angriness[10], ranginess[10], retaining[10], interning[10], grainiest[10], seriating[10], gannister[10], straining[10], trainings[10], inserting[10], sintering[10], assenting[10], sensating[10], tanginess[10], asserting[10], astringes[10], ganisters[10], resisting[10], sistering[10], attaining[10], tenanting[10], antitragi[10], iterating[10], integrant[10], nattering[10], rattening[10], intrigant[10], nitrating[10], retinting[10], satiating[10], instigate[10], instating[10], insetting[10], restating[10], retasting[10], striating[10], resitting[10], stringent[10], stagnates[10], stingiest[10], gastritis[10], strangest[10], raininess[9], sirenians[9], antiarins[9], taeniasis[9], tinniness[9], santerias[9], seatrains[9], intarsias[9], itinerant[9], insatiate[9], attainers[9], reattains[9], tearstain[9], instanter[9], intranets[9], transient[9], internist[9], astatines[9], sanitates[9], nattiness[9], stannites[9], insistent[9], resistant[9], straitens[9], tartiness[9]

8 letter words

anearing[9], arginine[9], anergias[9], angaries[9], arginase[9], aginners[9], earnings[9], engrains[9], grannies[9], ingrains[9], resining[9], sangrias[9], assigner[9], reassign[9], seringas[9], raisings[9], rinsings[9], aerating[9], training[9], ignatias[9], tannages[9], antigens[9], gentians[9], sainting[9], staining[9], ginniest[9], tannings[9], tanagers[9], granitas[9], angriest[9], astringe[9], ganister[9], gantries[9], granites[9], ingrates[9], rangiest[9], igniters[9], resiting[9], stingier[9], assignat[9], eastings[9], giantess[9], seatings[9], gastreas[9], stranges[9], gastrins[9], stingers[9], trigness[9], tainting[9], gnattier[9], treating[9], attiring[9], agitates[9], stagnate[9], estating[9], tangiest[9], sirenian[8], airiness[8], insnares[8], antiarin[8], triennia[8], antennas[8], antisera[8], ratanies[8], santeria[8], seatrain[8], intarsia[8], inertias[8], rainiest[8], entrains[8], trannies[8], entasias[8], isatines[8], sanities[8], sanitise[8], teniasis[8], insanest[8], stanines[8], tininess[8], asterias[8], atresias[8], satirise[8], santeras[8], artisans[8], tsarinas[8], artiness[8], retsinas[8], stainers[8], stearins[8], insister[8], sinister[8], attainer[8], reattain[8], intranet[8], astatine[8], sanitate[8]