IMPETUOUS /imˈpɛtʃuəs/ ► audio Scrabble 13 Words With Friends 17 Definition adjective characterized by undue haste and lack of thought or deliberation. — synonyms: hotheaded, impulsive, madcap, tearaway(a), brainish adjective marked by violent force. See all 229 words you can make from IMPETUOUS → 9-letter words Words starting with I Words ending with S ← Unscramble different letters