Separatist

n.

1.

One who withdraws or separates himself; especially, one who withdraws from a church to which he has belonged; a seceder from an established church; a dissenter; a nonconformist; a schismatic; a sectary. Heavy fines on divines who should preach in any meeting of separatist . - Macaulay.

Noun	1.	separatist - an advocate of secession or separation from a larger group (such as an established church or a national union) Synonyms: separationist
Adj.	1.	separatist - having separated or advocating separation from another entity or policy or attitude; "a breakaway faction" Synonyms: breakaway, fissiparous

abjuratory, apostate, backslider, bolter, breakaway, collaborationist, collaborator, convert, defector, demurrer, deserter, dissenter, dissentient, dissident, fifth columnist, misbeliever, mugwump, mugwumpian, mugwumpish, nonconformist, objector, opinionist, opposition voice, proselyte, protestant, protester, quisling, recidivist, recreant, recusant, renegade, renegado, renegate, renunciative, renunciatory, repudiative, repudiatory, reversionist, revocatory, runagate, schismatic, seceder, secessionist, sectarian, sectary, strikebreaker, tergiversant, tergiversator, traitor, turnabout, turncoat, turntail