is a specific kind of: controversialist, disputant, eristic.

is a broader term that covers: abolitionist, emancipationist | birth-control campaigner, birth-control reformer | Chartist | civil rights activist, civil rights leader, civil rights worker | demonstrator, protester | dry, prohibitionist | conservationist, environmentalist | feminist, libber, women's liberationist, women's rightist | flower child, hippie, hippy, hipster | freedom fighter, insurgent, insurrectionist, rebel | activist, militant | non-resistant, passive resister | preservationist | Utopian ... show more.

instances of which are: Anthony Comstock, Comstock | Dix, Dorothea Dix, Dorothea Lynde Dix | Hus, Huss, Jan Hus, John Huss | Owen, Robert Owen | Girolamo Savonarola, Savonarola | Francis Everett Townsend, Townsend | John Wilkes, Wilkes.

derivation: meliorism | reformism | reform | reform | reclaim, rectify, reform, regenerate | agitate, campaign, crusade, fight, press, push | progressive, reform-minded, reformist.

is a specific kind of: warrior.

derivation: crusade.