Commonwealth of Australia vs Northern Territory

Commonwealth of Australia and Northern Territory both are nouns.

Word	Noun	Adjective	Verb	Adverb
Commonwealth of Australia	Yes	No	No	No
Northern Territory	Yes	No	No	No

Commonwealth of Australia (noun)	Northern Territory (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 territory in north central Australia