geographical area vs Sunbelt

geographical area and Sunbelt both are nouns.

Word	Noun	Adjective	Verb	Adverb
geographical area	Yes	No	No	No
Sunbelt	Yes	No	No	No

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