geographical area vs Tidewater region

geographical area and Tidewater region both are nouns.

Word	Noun	Adjective	Verb	Adverb
geographical area	Yes	No	No	No
Tidewater region	Yes	No	No	No

geographical area (noun)	Tidewater region (noun)
a demarcated area of the Earth	the coastal plain of the South: eastern parts of Virginia and North Carolina and South Carolina and Georgia