Synonyms and related words :
BMOC, activist, ball of fire, beaver, big cheese, big noise, big shot, big wheel, big-timer, bustler, busy bee, doer, eager beaver, enthusiast, go-getter, high-muck-a-muck, his nibs, human dynamo, hustler, live wire, man of action, man of deeds, militant, new broom, operator, political activist, powerhouse, take-charge guy, wheel, wheeler-dealer, winner