Rio Bravo vs Rio Grande

Rio Bravo and Rio Grande both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rio Bravo	Yes	No	No	No
Rio Grande	Yes	No	No	No

As nouns, Rio Bravo and Rio Grande are synonyms defined as:

Rio Bravo and Rio Grande: a North American river; boundary between the United States and Mexico; flows into Gulf of Mexico

Rio Bravo (noun)	Rio Grande (noun)
a North American river; boundary between the United States and Mexico; flows into Gulf of Mexico	a North American river; boundary between the United States and Mexico; flows into Gulf of Mexico