Longman Dictionary of Contemporary English
white supremacist
noun
EXAMPLES FROM CORPUS
▪ The killer: a white supremacist named Robert Chambliss.
▪ There is growing evidence that white supremacist groups are renewing hate campaigns against Aborigines in some provincial towns.
▪ They changed the subject by noting their prosecution of some highly publicized cases against the Klan and other white supremacist organizations.
Wiktionary
white supremacist
n. An advocate of white supremacy, a person who believes that the white race is inherently superior to other races and that white people should have control over people of other races.
WordNet
white supremacist
n. a person who believes that the white race is or should be supreme
Usage examples of "white supremacist".
The Commander-In-Chief of the United American Armed Forces rightly figured that because the airplane had been stolen from Hunter while he was fighting with the UAAF against the white supremacist armies of the American Southwest, then it was only right that the UAAF do everything in its power to retrieve it.
Undead terrorists are testing a doomsday virus on his new hometown and he's caught in the crossfire between a white supremacist militia and the resurrected Civil War dead.