Africa vs Republic of Zambia

Africa and Republic of Zambia both are nouns.

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

Africa (noun)	Republic of Zambia (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 central Africa; formerly controlled by Great Britain and called Northern Rhodesia until it gained independence within the commonwealth in 1964