Tasmania vs island

Tasmania and island both are nouns.

Word	Noun	Adjective	Verb	Adverb
Tasmania	Yes	No	No	No
island	Yes	No	No	No

Tasmania (noun)	island (noun)
an island off the southeastern coast of Australia	a zone or area resembling an island
an Australian state on the island of Tasmania	a land mass (smaller than a continent) that is surrounded by water