Australia vs Namoi River

Australia and Namoi River both are nouns.

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

Australia (noun)	Namoi River (noun)
a nation occupying the whole of the Australian continent; Aboriginal tribes are thought to have migrated from southeastern Asia 20,000 years ago; first Europeans were British convicts sent there as a penal colony	a river in southeastern Australia that flows generally northwest to join the Darling River
the smallest continent; between the South Pacific and the Indian Ocean