sealed vs Australia

sealed is not a noun while Australia is a noun.

Word	Noun	Adjective	Verb	Adverb
sealed	No	Yes	No	No
Australia	Yes	No	No	No

sealed (noun)	Australia (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
	the smallest continent; between the South Pacific and the Indian Ocean

sealed (adjective)	Australia (adjective)
closed or secured with or as if with a seal
established irrevocably
undisclosed for the time being
determined irrevocably
apply a non-porous coating to something so as to ensure it is impervious
covered with a waterproof coating
(of walls) covered with a coat of plaster