geographic region vs Turkestan

geographic region and Turkestan both are nouns.

Word	Noun	Adjective	Verb	Adverb
geographic region	Yes	No	No	No
Turkestan	Yes	No	No	No

geographic region (noun)	Turkestan (noun)
a demarcated area of the Earth	a historical region of central Asia that was a center for trade between the East and the West