Orinoco River vs Orinoco

Orinoco River and Orinoco both are nouns.

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

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

Orinoco River and Orinoco: a South American river 1,500 miles long; flows into the South Atlantic

Orinoco River (noun)	Orinoco (noun)
a South American river 1,500 miles long; flows into the South Atlantic	a South American river 1,500 miles long; flows into the South Atlantic