river vs Elbe

river and Elbe both are nouns.

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

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