geographical region vs East

geographical region and East both are nouns.

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

geographical region (noun)	East (noun)
a demarcated area of the Earth	the countries of Asia
	the region of the United States lying to the north of the Ohio River and to the east of the Mississippi River