Bantu vs Bechuana

Bantu and Bechuana both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bantu	Yes	Yes	No	No
Bechuana	Yes	No	No	No

As nouns, Bechuana is a hyponym of Bantu; that is, Bechuana is a word with a more specific, narrower meaning than Bantu:

Bantu: a member of any of a large number of linguistically related peoples of Central and South Africa
Bechuana: a member of a Bantu people living chiefly in Botswana and western South Africa

Other hyponyms of Bantu include Herero, Hutu, Chiluba, Luba, Sotho, Batswana, Tswana, Tutsi, Watusi, Watutsi, Shona.

Bantu (noun)	Bechuana (noun)
a family of languages widely spoken in the southern half of the African continent	a member of a Bantu people living chiefly in Botswana and western South Africa
a member of any of a large number of linguistically related peoples of Central and South Africa

Bantu (adjective)	Bechuana (adjective)
of or relating to the African people who speak one of the Bantoid languages or to their culture