African country vs Republic of South Africa

African country and Republic of South Africa both are nouns.

Word	Noun	Adjective	Verb	Adverb
African country	Yes	No	No	No
Republic of South Africa	Yes	No	No	No

African country (noun)	Republic of South Africa (noun)
any one of the countries occupying the African continent	a republic at the southernmost part of Africa; achieved independence from the United Kingdom in 1910; first European settlers were Dutch (known as Boers)