Douglas Harper's Etymology Dictionary
supremist
1640s, "one who holds supreme authority," from supreme + -ist.
Usage examples of "supremist".
A sense of self-doubt lingered on him, but day by day it got weaker as he realized that he could not have prevented the death of his wife in the same white supremist attack that wounded him.
During the period of severe disorientation, women the world over were taking the opportunity to beat down the revisionist male supremist pigs.
You have in your employ a group of sociopathic white supremists who killed the wife of a friend of mine, wounded him and have all but incited race warfare down in Eclipse.