Elbe River vs river

Elbe River and river both are nouns.

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

Elbe River (noun)	river (noun)
a river in central Europe that arises in northwestern Czechoslovakia and flows northward through Germany to empty into the North Sea	a large natural stream of water (larger than a creek)