Elbe vs Elbe River

Elbe and Elbe River both are nouns.

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

As nouns, Elbe and Elbe River are synonyms defined as:

Elbe and Elbe River: a river in central Europe that arises in northwestern Czechoslovakia and flows northward through Germany to empty into the North Sea

Elbe (noun)	Elbe River (noun)
a river in central Europe that arises in northwestern Czechoslovakia and flows northward through Germany to empty into the North Sea	a river in central Europe that arises in northwestern Czechoslovakia and flows northward through Germany to empty into the North Sea