Republic of Madagascar vs Africa

Republic of Madagascar and Africa both are nouns.

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

Republic of Madagascar (noun)	Africa (noun)
a republic on the island of Madagascar; achieved independence from France in 1960	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