placidity Synonyms

serenity tranquillity tranquility peacefulness quiet composure repose placidness sereneness stillness still rest silence sang-froid self-possession serenitude self-composedness tranquilness unflappability untroubledness restfulness composedness sangfroid cosiness imperturbability peaceableness peace of mind contentedness well-being quietude quietness coolness cool contentment content comfort collectedness calmness calm ataraxy ataraxia apyrexia dispassion docility ease imperturbation poise peace patience lull