Secessionist

n.	1.	One who upholds secession.
	2.	(U.S. Hist.) One who holds to the belief that a State has the right to separate from the Union at its will.

Noun

1.

secessionist - an advocate of secessionism

abjuratory, apostate, backslider, bolter, breakaway, collaborationist, collaborator, convert, defector, deserter, fifth columnist, mugwump, mugwumpian, mugwumpish, proselyte, quisling, recidivist, recreant, renegade, renegado, renegate, renunciative, renunciatory, repudiative, repudiatory, reversionist, revocatory, runagate, schismatic, seceder, separatist, strikebreaker, tergiversant, tergiversator, traitor, turnabout, turncoat, turntail