river vs Araguaia

river and Araguaia both are nouns.

Word	Noun	Adjective	Verb	Adverb
river	Yes	No	No	No
Araguaia	Yes	No	No	No

river (noun)	Araguaia (noun)
a large natural stream of water (larger than a creek)	a river in central Brazil that flows generally northward (with many falls) to join the Tocantins River