Elbe River vs Elbe

Elbe River and Elbe both are nouns.

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

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

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

Elbe River (noun)	Elbe (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