Turkestan vs geographical region

Turkestan and geographical region both are nouns.

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

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