Namoi vs Namoi River

Namoi and Namoi River both are nouns.

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

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

Namoi and Namoi River: a river in southeastern Australia that flows generally northwest to join the Darling River

Namoi (noun)	Namoi River (noun)
a river in southeastern Australia that flows generally northwest to join the Darling River	a river in southeastern Australia that flows generally northwest to join the Darling River