Calmness

Part of speech: noun (n.)

The state of quality of being calm; quietness; tranquillity; self-repose. The gentle calmness of the flood. Denham. Hes calmness was the repose of conscious power. E. Everett.

Synonyms: Quietness; quietude; stillness; tranquillity; serenity; repose; composure; sedateness; placidity.