Elbe vs river

Elbe and river both are nouns.

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

Elbe (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)