WordNet sense 1 (a person with a prejudiced belief that one race is superior to others):

racialist

WordNet sense 2 (of or characteristic of race or races or arising from differences among groups):

racial

WordNet sense 3 (discriminatory especially on the basis of race or religion):

antiblack, anti-Semite

WordNet sense 4 (being biased or having a belief or attitude formed beforehand):

discriminatory, prejudiced