automaton Get Printable Handwriting (au-tom-a-ton) 4 syllables Rhymes Learn It! Spelling Test Definition noun. 1 a mechanism that can move automatically; 2 someone who acts or responds in a mechanical or apathetic way Example Sentence An automaton is going to replace the line worker. Synonyms robot; golem; zombie; machine Antonyms tiger Rhymes Four Syllable Rhymes (1) automaton Share with your friends: