Tidewater vs Tidewater region

Tidewater and Tidewater region both are nouns.

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

As nouns, Tidewater and Tidewater region are synonyms defined as:

Tidewater and Tidewater region: the coastal plain of the South: eastern parts of Virginia and North Carolina and South Carolina and Georgia

Tidewater (noun)	Tidewater region (noun)
the coastal plain of the South: eastern parts of Virginia and North Carolina and South Carolina and Georgia	the coastal plain of the South: eastern parts of Virginia and North Carolina and South Carolina and Georgia