The antonyms for the word "are terrorstricken" are calm, composed, collected, relaxed, and tranquil. These descriptive words signify a state of peace, ease, and serenity. Being opposed to terrorstricken, which implies extreme fear and anxiety, the opposite words indicate a sense of control and stability. When someone is calm, they are not overwhelmed by feelings of terror or panic. When someone is composed, they have a level-headed approach to a situation, rather than an emotional one. Collectively, these antonyms suggest a state of inner peace and a sense of security, which is the opposite of terrorstricken.