racialism vs discrimination

racialism and discrimination both are nouns.

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

As nouns, discrimination is a hypernym of racialism; that is, discrimination is a word with a broader meaning than racialism:

racialism: discriminatory or abusive behavior towards members of another race
discrimination: unfair treatment of a person or group on the basis of prejudice

Other hypernyms of racialism include favoritism, favouritism.

racialism (noun)	discrimination (noun)
discriminatory or abusive behavior towards members of another race	unfair treatment of a person or group on the basis of prejudice
	the cognitive process whereby two or more stimuli are distinguished