Rhine vs Rhine River

Rhine and Rhine River both are nouns.

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

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

Rhine and Rhine River: a major European river carrying more traffic than any other river in the world; flows into the North Sea

Other synonyms of Rhine include Rhein.

Rhine (noun)	Rhine River (noun)
a major European river carrying more traffic than any other river in the world; flows into the North Sea	a major European river carrying more traffic than any other river in the world; flows into the North Sea
United States parapsychologist (1895-1980)