tidewater vs tidewater stream

tidewater and tidewater stream both are nouns.

Word	Noun	Adjective	Verb	Adverb
tidewater	Yes	No	No	No
tidewater stream	Yes	No	No	No

tidewater (noun)	tidewater stream (noun)
low-lying coastal land drained by tidal streams	a stream in which the effects of the tide extend far upstream