tidewater stream vs tidewater river

tidewater stream and tidewater river both are nouns.

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

As nouns, tidewater stream and tidewater river are synonyms defined as:

tidewater stream and tidewater river: a stream in which the effects of the tide extend far upstream

Other synonyms of tidewater stream include tidal river, tidal stream.

tidewater stream (noun)	tidewater river (noun)
a stream in which the effects of the tide extend far upstream	a stream in which the effects of the tide extend far upstream