WordNet: crusader, meliorist, reformer, reformist, social reformer

a disputant who advocates reform

• hypernym controversialist, disputant, eristic

• hyponym abolitionist, emancipationist

• hyponym birth-control campaigner, birth-control reformer

• hyponym Chartist

• hyponym civil rights activist, civil rights leader, civil rights worker

• hyponym demonstrator, protester

• hyponym dry, prohibitionist

• hyponym conservationist, environmentalist

• hyponym feminist, libber, women's liberationist, women's rightist

• hyponym flower child, hippie, hippy, hipster

• hyponym freedom fighter, insurgent, insurrectionist, rebel

• hyponym activist, militant

• hyponym non-resistant, passive resister

• hyponym preservationist

• hyponym Utopian

crusader

• (englanti) crusade (derivationally related)
• (suomi) kampanjoitsija (synonyymi)

meliorist

• (englanti) meliorism (derivationally related)
• (suomi) melioristi (synonyymi)

reformer

• (englanti) reform (derivationally related)
• (suomi) uudistaja (synonyymi)

reformist

• (englanti) reform (derivationally related)

• (englanti) reform (derivationally related)

• (englanti) reform (derivationally related)

• (englanti) reformist (derivationally related)

• (englanti) reformism (derivationally related)
• (suomi) reformisti (synonyymi)

social reformer

• (suomi) uudistaja (synonyymi)