Republic of Ghana vs Africa

Republic of Ghana and Africa both are nouns.

Word	Noun	Adjective	Verb	Adverb
Republic of Ghana	Yes	No	No	No
Africa	Yes	No	No	No

Republic of Ghana (noun)	Africa (noun)
a republic in West Africa on the Gulf of Guinea	the second largest continent; located to the south of Europe and bordered to the west by the South Atlantic and to the east by the Indian Ocean