Ping vs Ping River

Ping and Ping River both are nouns.

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

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

Ping and Ping River: a river in western Thailand; a major tributary of the Chao Phraya

Ping (noun)	Ping River (noun)
a river in western Thailand; a major tributary of the Chao Phraya	a river in western Thailand; a major tributary of the Chao Phraya