activism \activism\ n.

1. a policy of taking direct and militant action to achieve a political or social goal. [WordNet 1.5]

Source: The Collaborative International Dictionary of English v.0.48
 

31 Moby Thesaurus words for "activism": act, acting, action, activeness, activity, behavior, business, doing, doings, employment, exercise, function, functioning, goings-on, militancy, motion, movement, movements, occupation, operation, operations, play, political activism, practice, praxis, proceedings, stir, swing, work, working, workings

Source: Moby Thesaurus II by Grady Ward, 1.0
 

activism

Source: WordNet (r) 2.0