Chichewa vs African

Chichewa and African both are nouns.

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

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

Chichewa: a member of the Bantu-speaking people of Malawi and eastern Zambia and northern Zimbabwe
African: a native or inhabitant of Africa

Chichewa (noun)	African (noun)
the Bantu language of the Chewa of east central Africa	a native or inhabitant of Africa
a member of the Bantu-speaking people of Malawi and eastern Zambia and northern Zimbabwe

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