Great Rift Valley vs Asia

Great Rift Valley and Asia both are nouns.

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

Great Rift Valley (noun)	Asia (noun)
(geology) a depression in southwestern Asia and eastern Africa; extends from the valley of the Jordan River to Mozambique; marked by geological faults	the nations of the Asian continent collectively
	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