river vs Tennessee River

river and Tennessee River both are nouns.

Word	Noun	Adjective	Verb	Adverb
river	Yes	No	No	No
Tennessee River	Yes	No	No	No

river (noun)	Tennessee River (noun)
a large natural stream of water (larger than a creek)	a river formed by the confluence of two other rivers near Knoxville; it follows a U-shaped course to become a tributary of the Ohio River in western Kentucky