African country vs Republic of Zambia

African country and Republic of Zambia both are nouns.

Word	Noun	Adjective	Verb	Adverb
African country	Yes	No	No	No
Republic of Zambia	Yes	No	No	No

African country (noun)	Republic of Zambia (noun)
any one of the countries occupying the African continent	a republic in central Africa; formerly controlled by Great Britain and called Northern Rhodesia until it gained independence within the commonwealth in 1964