white supremacy vs racism

white supremacy and racism both are nouns.

Word	Noun	Adjective	Verb	Adverb
white supremacy	Yes	No	No	No
racism	Yes	No	No	No

As nouns, racism is a hypernym of white supremacy; that is, racism is a word with a broader meaning than white supremacy:

white supremacy: the prejudice that members of the white race are superior to members of other races
racism: the prejudice that members of one race are intrinsically superior to members of other races

white supremacy (noun)	racism (noun)
the prejudice that members of the white race are superior to members of other races	discriminatory or abusive behavior towards members of another race
	the prejudice that members of one race are intrinsically superior to members of other races