List of self-possession synonyms and self-possession related words.
aplomb, assurance, ataraxy, balance, calmness, composure, confidence, constraint, control, coolness, discipline, equability, equanimity, equilibrium, imperturbability, independence, level head, levelheadedness, phlegm, poise, possession, presence of mind, restraint, sangfroid, self-assurance, self-command, self-confidence, self-conquest, self-control, self-denial, self-discipline, self-government, self-mastery, self-restraint, well-regulated mind