Synonyms For "Stupid" :
1 syllable:
dazed, dense, dim, dolt, dull, dumb, slow, stunned, stupe, thick, weak
2 syllables:
cloddish, confused, doltish, dopey, dopy, dullard, duncish, foolish, gaumless, goosey, goosy, gormless, inane, jerky, lumpen, lumpish, obtuse, pillock, poor fish, senseless, witless
3 syllables:
anserine, asinine, blockheaded, boneheaded, duncical, fatheaded, fatuous, gooselike, nitwitted, stupefied, thickheaded, unthinking