tranquilness

evenness of emotions or temper he maintained his gentle tranquilness despite the provocations Synonyms aplomb, calmness, collectedness, composedness, composure, cool, coolness, countenance, equilibrium, imperturbability, placidity, repose, sangfroid, self-composedness, self-possession, serenity, tranquillity (or tranquility), equanimityRelated Words assurance, confidence, poise, self-assurance, self-assuredness, self-confidence, self-trust; easygoingness, laid-backness; apathy, detachment, impassivity, indifference, insensibility, numbness, phlegm, unconcernNear Antonyms alarm (also alarum), anxiety, anxiousness, apprehension, apprehensiveness, care, concern, disquiet, solicitude, uneasiness, worry; excitability, excitableness, nervousness; disturbanceAntonyms agitation, discomposure, perturbation