Sambre River vs Sambre

Sambre River and Sambre both are nouns.

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

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

Sambre River and Sambre: a river in western Europe that rises in northern France and flows generally east into Belgium where it joins the Meuse at Namur

Sambre River (noun)	Sambre (noun)
a river in western Europe that rises in northern France and flows generally east into Belgium where it joins the Meuse at Namur	a river in western Europe that rises in northern France and flows generally east into Belgium where it joins the Meuse at Namur