eastern hemisphere vs Afro-Eurasia

eastern hemisphere and Afro-Eurasia both are nouns.

Word	Noun	Adjective	Verb	Adverb
eastern hemisphere	Yes	No	No	No
Afro-Eurasia	Yes	No	No	No

eastern hemisphere (noun)	Afro-Eurasia (noun)
the hemisphere that includes Eurasia and Africa and Australia	regions of the world such as Africa, Europe and Asia that were known to Europeans before the discovery of the Americas which they called the New World