racialist vs bigot

racialist and bigot both are nouns.

Word	Noun	Adjective	Verb	Adverb
racialist	Yes	No	No	No
bigot	Yes	No	No	No

As nouns, bigot is a hypernym of racialist; that is, bigot is a word with a broader meaning than racialist:

racialist: a person with a prejudiced belief that one racial group is superior to others
bigot: a prejudiced person who is intolerant of any opinions differing from his own

racialist (noun)	bigot (noun)
a person with a prejudiced belief that one racial group is superior to others	a prejudiced person who is intolerant of any opinions differing from his own