191 silly synonyms include foolish, stupid, unintelligent, idiotic, brainless, mindless, witless, imbecilic, imbecile, and doltish. Silly is an adjective, and its antonyms are sensible and rational. Here are some additional synonyms for "silly" with example sentences.
191 other ways to say silly.
at the silly joke.
He told a very silly joke.
She wore a silly hat today.
That was a really silly mistake.