supremacist[sə prem′ə sist, so̵̅o̅-]
supremacist definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a person who believes in or promotes the supremacy of a particular group
supremacist definition by American Heritage Dictionary
One who believes that a certain group is or should be supreme.