use '?' for JOKER (blank)

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

13 letter words

gastronomists[16]

12 letter words

gastronomist[15]

11 letter words

agronomists[14]

10 letter words

agronomist[13]

9 letter words

organisms[12], sonograms[12], motorings[12], angstroms[12], tantrisms[11], transmits[11], motorists[11], misstarts[11], assignors[10], rogations[10], assorting[10], organists[10], arsonists[9], rotations[9], ostinatos[9], strontias[9]

8 letter words

organism[11], sonogram[11], moorings[11], osmosing[11], isograms[11], motoring[11], antismog[11], migrants[11], smarting[11], angstrom[11], storming[11], gnomists[11], mattings[11], amotions[10], monitors[10], stasimon[10], amorists[10], transoms[10], tsarisms[10], missorts[10], ottomans[10], tantrism[10], transmit[10], tritomas[10], motorist[10], atomists[10], misstart[10], statisms[10], assignor[9], signoras[9], soarings[9], rogation[9], organist[9], roasting[9], roosting[9], agonists[9], gastrins[9], orgiasts[9], ringtoss[9], rotating[9], toasting[9], starting[9], orations[8], arsonist[8], santoors[8], torsions[8], assistor[8], rotation[8], ostinato[8], strontia[8], arnottos[8], rattoons[8], tortonis[8], stations[8], transits[8], risottos[8], tsarists[8]

7 letter words

roaming[10], mooring[10], rooming[10], armings[10], margins[10], isogram[10], morgans[10], massing[10], mossing[10], orgasms[10], ogrisms[10], moating[10], mooting[10], marting[10], migrant[10], masting[10], matings[10], amongst[10], gnomist[10], stigmas[10], matting[10], amorino[9], maroons[9], romanos[9], morions[9], simoons[9], ramsons[9], ransoms[9], osmosis[9], amotion[9], monitor[9], manitos[9], motions[9], martins[9], amorist[9], matrons[9], transom[9], santims[9], monists[9], tsarism[9], missort[9], ottoman[9], tritoma[9], mattins[9], atomist[9], statism[9], origans[8], signora[8], soaring[8], roosing[8], isogons[8], sarongs[8], grisons[8], signors[8], sorings[8], assigns[8], sassing[8], gossans[8], orating[8], rooting[8], agonist[8], gitanos[8], sooting[8], gastrin[8], gratins[8], ratings[8], staring[8], orgiast[8], sorting[8], storing[8], trigons[8], trogons[8], stingos[8], tossing[8], strings[8], tooting[8], ratting[8], tarting[8], rotting[8], stating[8], tasting[8], grottos[8], ariosos[7], orisons[7], sorosis[7], oration[7], aroints[7], rations[7], ratoons[7], santoor[7], nitroso[7], torsion[7], instars[7], santirs[7], strains[7], aorists[7], aristos[7], satoris[7], tsooris[7], ostosis[7], assorts[7], arnotto[7], rattoon[7], tortoni[7], station[7], transit[7], attorns[7], rattons[7], intorts[7], tritons[7], risotto[7], statins[7], tanists[7], tatsois[7], stotins[7], artists[7], straits[7], tsarist[7], stators[7]

6 letter words

mooing[9], arming[9], margin[9], oaring[7]