Synonyms: tranquility, tranquillity, serenity, quiet, placidity, repose
Definition: a disposition free from stress or emotion
Similar words: equanimity, composure, calm, calmness
Definition: steadiness of mind under stress
Usage: he accepted their problems with composure and she with equanimity
Synonyms: placidity, placidness
Definition: a feeling of calmness; a quiet and undisturbed feeling
Similar words: calmness
Definition: a feeling of calm; an absence of agitation or excitement