spineless Get Printable Handwriting (spine-less) 2 syllables Rhymes Learn It! Spelling Test Definition adjective. without courage or determination; weak-willed; lacking a strong character. Example Sentence He showed a spineless response to the challenging situation. Synonyms cowardly; timid; fearful; feeble; gutless Antonyms brave; courageous; strong-willed; resolute; bold Rhymes Two Syllable Rhymes (1) spineless Share with your friends: