Africa vs Republic of Ghana

Africa and Republic of Ghana both are nouns.

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

Africa (noun)	Republic of Ghana (noun)
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	a republic in West Africa on the Gulf of Guinea