river vs Chao Phraya

river and Chao Phraya both are nouns.

Word	Noun	Adjective	Verb	Adverb
river	Yes	No	No	No
Chao Phraya	Yes	No	No	No

river (noun)	Chao Phraya (noun)
a large natural stream of water (larger than a creek)	a river in Thailand formed by the confluence of the Nan and Ping Rivers; flows southward past Bangkok and empties into the Gulf of Thailand