racism vs racialism

racism and racialism both are nouns.

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

As nouns, racism and racialism are synonyms defined as:

racism and racialism: discriminatory or abusive behavior towards members of another race

Other synonyms of racism include racial discrimination.

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