Parana River vs Parana

Parana River and Parana both are nouns.

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

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

Parana River and Parana: a South American river; tributary of Rio de la Plata

Parana River (noun)	Parana (noun)
a South American river; tributary of Rio de la Plata	a South American river; tributary of Rio de la Plata