Araguaya vs Araguaia River

Araguaya and Araguaia River both are nouns.

Word	Noun	Adjective	Verb	Adverb
Araguaya	Yes	No	No	No
Araguaia River	Yes	No	No	No

As nouns, Araguaya and Araguaia River are synonyms defined as:

Araguaya and Araguaia River: a river in central Brazil that flows generally northward (with many falls) to join the Tocantins River

Other synonyms of Araguaya include Araguaia, Araguaya River.

Araguaya (noun)	Araguaia River (noun)
a river in central Brazil that flows generally northward (with many falls) to join the Tocantins River	a river in central Brazil that flows generally northward (with many falls) to join the Tocantins River