Crusader

n.

1.

One engaged in a crusade; as, the crusaders of the Middle Ages. Azure-eyed and golden-haired, Forth the young crusaders fared. - Longfellow.

Noun	1.	crusader - a disputant who advocates reform Synonyms: meliorist, reformer, reformist
	2.	crusader - a warrior who engages in a holy war; "the crusaders tried to recapture the Holy Land from the Muslims"

abolitionist, activist, agitate, Anthony Comstock, birth-control campaigner, birth-control reformer, campaign, Chartist, civil rights activist, civil rights leader, civil rights worker, Comstock, conservationist, controversialist, crusade, demonstrator, disputant, dry, emancipationist, environmentalist, eristic, feminist, fight, flower child, Francis Everett Townsend, freedom fighter, Girolamo Savonarola, hippie, hippy, hipster, Hus, Huss, insurgent, insurrectionist, Jan Hus, John Huss, John Wilkes, libber, meliorist, militant, non-resistant, Owen, passive resister, preservationist, press, prohibitionist, protester, push, rebel, reformer, reformist, Robert Owen, Savonarola, Townsend, Utopian, Wilkes, women's liberationist, women's rightist