Seine vs Seine River

Seine and Seine River both are nouns.

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

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

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

Seine (noun)	Seine River (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