island vs Newfoundland

island and Newfoundland both are nouns.

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

island (noun)	Newfoundland (noun)
a zone or area resembling an island	a breed of very large heavy dogs with a thick coarse usually black coat; highly intelligent dogs and vigorous swimmers; developed in Newfoundland
a land mass (smaller than a continent) that is surrounded by water	an island in the north Atlantic