nontoxic Get Printable Handwriting (non-tox-ic) 3 syllables Rhymes Learn It! Spelling Test Definition adjective. not toxic; not injurious or dangerous Example Sentence We were assured the smell is nontoxic. Synonyms not toxic; not harmful; not dangerous Antonyms toxic; virulent Rhymes Two Syllable Rhymes (1) toxic Three Syllable Rhymes (1) nontoxic Share with your friends: