Sunbelt vs geographic region

Sunbelt and geographic region both are nouns.

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

Sunbelt (noun)	geographic region (noun)
states in the south and southwest that have a warm climate and tend to be politically conservative	a demarcated area of the Earth