racism vs preconception

racism and preconception both are nouns.

Word	Noun	Adjective	Verb	Adverb
racism	Yes	No	No	No
preconception	Yes	No	No	No

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

racism: the prejudice that members of one race are intrinsically superior to members of other races
preconception: a partiality that prevents objective consideration of an issue or situation

Other hypernyms of racism include bias, prejudice.

racism (noun)	preconception (noun)
discriminatory or abusive behavior towards members of another race	an opinion formed beforehand without adequate evidence
the prejudice that members of one race are intrinsically superior to members of other races	a partiality that prevents objective consideration of an issue or situation