Seine River vs Seine

Seine River and Seine both are nouns.

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

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

Seine River and Seine: a French river that flows through the heart of Paris and then northward into the English Channel

Seine River (noun)	Seine (noun)
a French river that flows through the heart of Paris and then northward into the English Channel	a French river that flows through the heart of Paris and then northward into the English Channel