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From letters Q, U, A, D, R, A, T, I, C, S  I made following words

10 letter words

quadratics[21]

9 letter words

quadratic[20]

8 letter words

quadrics[19], aquatics[18], quartics[18], quadrats[17], aquarist[16]

7 letter words

quadric[18], aquatic[17], quartic[17], acquits[17], quadrat[16], diquats[16], acarids[10], ascarid[10], cardias[10], drastic[10], daturic[10], custard[10], caritas[9], sudaria[8], daturas[8]

6 letter words

acquit[16], diquat[15], quasar[14], quarts[14], quirts[14], squirt[14], acarid[9], cardia[9], cairds[9], darics[9], dicast[9], ducats[9], casita[8], carats[8], crista[8], racist[8], triacs[8], acarus[8], uratic[8], citrus[8], rictus[8], rustic[8], stadia[7], triads[7], radius[7], datura[7], audits[7], arista[6], raitas[6], riatas[6], tarsia[6], tiaras[6], aurist[6]

5 letter words

qadis[14], qaids[14], quads[14], squad[14], quids[14], squid[14], aquas[13], quais[13], quasi[13], quart[13], quirt[13], squat[13], quits[13], acrid[8], caird[8], daric[8], acids[8], asdic[8], cadis[8], caids[8], cards[8], dicta[8], scudi[8], cruds[8], curds[8], ducat[8], ducts[8], acari[7], sacra[7], carat[7], triac[7], carts[7], scart[7], crits[7], auric[7], curia[7], arcus[7], scaur[7], scuta[7], cutis[7], ictus[7], crust[7], curst[7], raids[6], triad[6], adits[6], ditas[6], staid[6], tsadi[6], darts[6], drats[6], dirts[6], duras[6], ursid[6], audit[6], adust[6], dauts[6], duits[6], durst[6], turds[6], arias[5], raias[5], atria[5], raita[5], riata[5], tiara[5], airts[5], astir[5], sitar[5], stair[5], stria[5], tarsi[5], auras[5], auris[5], sutra[5]

4 letter words

qadi[13], qaid[13], quad[13], quid[13], qats[12], aqua[12], quai[12], acid[7], cadi[7], caid[7], card[7], cads[7], scad[7], disc[7], duci[7], crud[7], curd[7], cuds[7], scud[7], casa[6], asci[6], arcs[6], cars[6], scar[6], cris[6], acta[6], cart[6], crit[6], acts[6], cast[6], cats[6], scat[6], cist[6], tics[6], uric[6], arid[5], raid[5], aids[5], dais[5], sadi[5], said[5], rads[5], sard[5], rids[5], data[5], adit[5], dita[5], dart[5], drat[5], trad[5], dirt[5], tads[5], dits[5], dura[5], aria[4], raia[4], airs[4], rais[4], rias[4], sari[4], airt[4], aits[4], sati[4], arts[4], rats[4], star[4], tars[4], tsar[4], stir[4], aura[4]