placidness Synonyms

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