Activist

Noun

 * 1) one who is politically active in the role of a citizen; especially, one who campaigns for change
 * 2) one who is conspicuously more active in carrying out any occupational or professional functions.

Derived terms

 * activistic
 * direct activist

Related terms

 * activism

Synonyms

 * mover and shaker

Thesaurus
ball of fire; beaver; big-time operator; bustler; busy bee; doer; eager beaver; enthusiast; go-getter; human dynamo; hustler; live wire; man of action; man of deeds; militant; new broom; operator; political activist; powerhouse; take-charge guy; wheeler-dealer; winner