Asia vs Turkestan

Asia and Turkestan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Asia	Yes	No	No	No
Turkestan	Yes	No	No	No

Asia (noun)	Turkestan (noun)
the nations of the Asian continent collectively	a historical region of central Asia that was a center for trade between the East and the West
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