Yellowbellied means cowardly or afraid, but there are several antonyms for this word that describe bravery or boldness. These include courageous, fearless, daring, valiant, heroic, and intrepid. A person who is courageous is willing to face danger, difficulty, or pain without fear. Fearless means lacking fear or being bold in the face of danger. A daring person is not afraid to take risks, while a valiant individual is brave and heroic in the face of danger or difficulty. An intrepid person is fearless and unafraid even in the most difficult or perilous of circumstances. These antonyms for yellowbellied describe individuals who are not afraid to take risks or face challenges head-on.