Peace
Part of speech: interjection
Definition: Shortened form of peace out; goodbye.
Part of speech: noun
Definition: A state of tranquility, quiet, and harmony, e.g., a state free from civil disturbance. A state free of oppressive and unpleasant thoughts and emotions. Harmony in personal relations. A state free of war, in particular war between different countries.
Part of speech: verb
Definition: Shortened form of peace out; to leave.
Tranquility
Part of speech: noun
Definition: The state of being tranquil