Călm'ness, n.
(kăm'-), n. 1. The state or quality of being calm; quietness; tranquillity, as of the elements. “The gentle calmness of the flood.” Denham.
Sense 2. The state or quality of being unruffled or quiet; tranquillity; self-repose.
His calmness was the repose of conscious power. E. Everett.
Synonyms— Quietness; quietude; stillness; tranquillity; serenity; repose; composure; sedateness; placidity.