Somme vs Somme River

Somme and Somme River both are nouns.

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

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

Other synonyms of Somme include Battle of the Somme.

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

Other synonyms of Somme include Battle of the Somme.

Somme (noun)	Somme River (noun)
battle in World War I (1916)	battle in World War I (1916)
battle of World War II (1944)	battle of World War II (1944)