island vs New Ireland

island and New Ireland both are nouns.

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

island (noun)	New Ireland (noun)
a zone or area resembling an island	an island in the Bismarck Archipelago; part of Papua New Guinea
a land mass (smaller than a continent) that is surrounded by water