foolish Get Printable Handwriting (fool-ish) 2 syllables Rhymes Learn It! Spelling Test Definition adjective. showing or marked by a lack of good sense or judgment; conceived or made without regard for reason or reality Example Sentence I was acting very foolish at the party. Synonyms senseless; brainless; silly Antonyms wise; sensible Rhymes Two Syllable Rhymes (1) foolish Share with your friends: