The word "more murder" is itself an antonym of peace, tranquility, and calm. However, if we wish to explore further antonyms for "more murder," we may consider words like harmony, unity, and concord. These words convey a sense of coming together and establishing peace, rather than perpetuating violence and chaos. Other antonyms for "more murder" could include empathy, kindness, compassion, and forgiveness. These words represent the opposite of anger, violence, and aggression. Ultimately, seeking antonyms for "more murder" promotes a world that is characterized by hope, understanding, and love instead of fear and hostility.