African vs doer

African and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
African	Yes	Yes	No	No
doer	Yes	No	No	No

As nouns, doer is a hypernym of African; that is, doer is a word with a broader meaning than African:

Other hypernyms of African include actor, worker.

African (noun)	doer (noun)
a native or inhabitant of Africa	a person who acts and gets things done

African (adjective)	doer (adjective)
of or relating to the nations of Africa or their peoples