The word "lion-hearted" is often used to describe someone who is brave, fearless, and confident in their mannerisms. However, there are some antonyms that can be used to describe someone who is the opposite of lion-hearted. One such word is "timid," which suggests a person who lacks courage and feels apprehensive or afraid of taking risks. Another antonym could be "cowardly," which implies that someone is easily scared and lacks the bravery required to face danger. Additionally, words like "fearful," "anxious," and "nervous" can be used to describe someone who is not lion-hearted. Ultimately, these antonyms serve to highlight the importance of bravery and courage in combating fear and uncertainty.