Tocantins vs Tocantins River

Tocantins and Tocantins River both are nouns.

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

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

Tocantins and Tocantins River: a river in eastern Brazil that flows generally north to the Para River

Tocantins (noun)	Tocantins River (noun)
a river in eastern Brazil that flows generally north to the Para River	a river in eastern Brazil that flows generally north to the Para River