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.
Example sentence: Peace comes from within. Do not seek it without.
Serenity
Part of speech: noun
Definition: The state of being serene; calmness; peacefulness.A lack of agitation or disturbance.A title given to a reigning prince or similar dignitary.