Asia vs Great Rift Valley

Asia and Great Rift Valley both are nouns.

Word	Noun	Adjective	Verb	Adverb
Asia	Yes	No	No	No
Great Rift Valley	Yes	No	No	No

Asia (noun)	Great Rift Valley (noun)
the nations of the Asian continent collectively	(geology) a depression in southwestern Asia and eastern Africa; extends from the valley of the Jordan River to Mozambique; marked by geological faults
the largest continent with 60% of the earth's population; it is joined to Europe on the west to form Eurasia; it is the site of some of the world's earliest civilizations