eastern hemisphere vs Africa

eastern hemisphere and Africa both are nouns.

Word	Noun	Adjective	Verb	Adverb
eastern hemisphere	Yes	No	No	No
Africa	Yes	No	No	No

eastern hemisphere (noun)	Africa (noun)
the hemisphere that includes Eurasia and Africa and Australia	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