geographical region vs Fertile Crescent

geographical region and Fertile Crescent both are nouns.

Word	Noun	Adjective	Verb	Adverb
geographical region	Yes	No	No	No
Fertile Crescent	Yes	No	No	No

geographical region (noun)	Fertile Crescent (noun)
a demarcated area of the Earth	a geographical area of fertile land in the Middle East stretching in a broad semicircle from the Nile to the Tigris and Euphrates