island vs New Caledonia

island and New Caledonia both are nouns.

Word	Noun	Adjective	Verb	Adverb
island	Yes	No	No	No
New Caledonia	Yes	No	No	No

island (noun)	New Caledonia (noun)
a zone or area resembling an island	an island to the to the east of Australia and to the north of New Zealand
a land mass (smaller than a continent) that is surrounded by water