African vs worker

African and worker both are nouns.

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

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

Other hypernyms of African include actor, doer.

African (noun)	worker (noun)
a native or inhabitant of Africa	sterile member of a colony of social insects that forages for food and cares for the larvae
	a person who works at a specific occupation
	a member of the working class (not necessarily employed)
	a person who acts and gets things done

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