supremacism vs belief

supremacism and belief both are nouns.

Word	Noun	Adjective	Verb	Adverb
supremacism	Yes	No	No	No
belief	Yes	No	No	No

As nouns, belief is a hypernym of supremacism; that is, belief is a word with a broader meaning than supremacism:

supremacism: the belief that some particular group or race is superior to all others
belief: any cognitive content held as true

supremacism (noun)	belief (noun)
the belief that some particular group or race is superior to all others	any cognitive content held as true
	a vague idea in which some confidence is placed