Commonwealth of Australia vs Lake Eyre

Commonwealth of Australia and Lake Eyre both are nouns.

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

Commonwealth of Australia (noun)	Lake Eyre (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 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