Grade 3 careful Get Printable Handwriting (care-ful) 2 syllables Rhymes Learn It! Spelling Test Definition adjective. taking care in one's actions; cautious; done with care and effort Example Sentence Be careful when crossing the road. Synonyms watchful; cautious; paying attention Antonyms careless; thoughtless; sloppy Rhymes Two Syllable Rhymes (2) careful prayerful Share with your friends: