country vs Commonwealth of Australia

country and Commonwealth of Australia both are nouns.

Word	Noun	Adjective	Verb	Adverb
country	Yes	No	No	No
Commonwealth of Australia	Yes	No	No	No

country (noun)	Commonwealth of Australia (noun)
a politically organized body of people under a single government	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
the people who live in a nation or country
the territory occupied by a nation
an area outside of cities and towns
a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)