African nation vs Republic of Burundi

African nation and Republic of Burundi both are nouns.

Word	Noun	Adjective	Verb	Adverb
African nation	Yes	No	No	No
Republic of Burundi	Yes	No	No	No

African nation (noun)	Republic of Burundi (noun)
any one of the countries occupying the African continent	a landlocked republic in east central Africa on the northeastern shore of Lake Tanganyika