racism vs favouritism

racism and favouritism both are nouns.

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

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

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

Other hypernyms of racism include discrimination, favoritism.

racism (noun)	favouritism (noun)
discriminatory or abusive behavior towards members of another race	unfair treatment of a person or group on the basis of prejudice
the prejudice that members of one race are intrinsically superior to members of other races	an inclination to favor some person or group