Islamic Republic of Mauritania vs African nation

Islamic Republic of Mauritania and African nation both are nouns.

Word	Noun	Adjective	Verb	Adverb
Islamic Republic of Mauritania	Yes	No	No	No
African nation	Yes	No	No	No

Islamic Republic of Mauritania (noun)	African nation (noun)
a country in northwestern Africa with a provisional military government; achieved independence from France in 1960; largely western Sahara Desert	any one of the countries occupying the African continent