Lake Eyre vs Commonwealth of Australia

Lake Eyre and Commonwealth of Australia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lake Eyre	Yes	No	No	No
Commonwealth of Australia	Yes	No	No	No

Lake Eyre (noun)	Commonwealth of Australia (noun)
a shallow salt lake in south central Australia about 35 feet below sea level; the largest lake in the country and the lowest point on the continent	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