Madagascar vs Africa

Madagascar and Africa both are nouns.

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

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
an island in the Indian Ocean off the southeastern coast of Africa; the 4th largest island in the world