Tidewater region vs Tidewater

Tidewater region and Tidewater both are nouns.

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

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

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

Tidewater region (noun)	Tidewater (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