possession
1 control, custody, hold, occupancy, occupation, ownership, proprietorship, tenure, title
2 (plural)
assets, belongings, chattels, effects, estate, goods and chattels, property, things, wealth
3 colony, dominion, protectorate, province, territory
self-possession
aplomb, composure, confidence, cool (slang) poise, sang-froid, self-command, unflappability (informal)