Rhine River vs Rhine

Rhine River and Rhine both are nouns.

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

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

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

Other synonyms of Rhine River include Rhein.

Rhine River (noun)	Rhine (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)