placidness Synonyms

placidity untroubledness stillness silence serenity sereneness self-possession security rest repose quietude quietness quiet stolidity tranquillity restfulness presence of mind sangfroid cosiness imperturbability rhythmicity peace of mind contentedness peacefulness tranquility impassiveness well-being poise inactivity coolness contentment content composure comfort collectedness calmness calm bliss ataraxy ataraxia dispassion ease enjoyment peace nirvana mildness lull joy impassivity hush