Vetluga River vs Vetluga

Vetluga River and Vetluga both are nouns.

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

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

Vetluga River and Vetluga: a river in central Russia; flows generally southward into the Volga

Vetluga River (noun)	Vetluga (noun)
a river in central Russia; flows generally southward into the Volga	a river in central Russia; flows generally southward into the Volga