Calm
Part of speech: noun
Definition: The state of being calm; peacefulness; absence of worry, anger, fear or other strong negative emotion. The state of being calm; absence of noise and disturbance. A period of time without wind.
Part of speech: adjective
Definition: Peaceful, quiet, especially free from anger and anxiety. Free of noise and disturbance.
Part of speech: verb
Definition: To make calm. To become calm.
Example sentence: Calm mind brings inner strength and self-confidence, so that's very important for good health.
Serene
Part of speech: adjective
Definition: Peaceful, calm, unruffled; unaffected by disturbance.(Of the sky) fair and unclouded.Peaceful, calm, unruffled.