island vs Montserrat

island and Montserrat both are nouns.

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

island (noun)	Montserrat (noun)
a zone or area resembling an island	a volcanic island in the Caribbean; in the West Indies
a land mass (smaller than a continent) that is surrounded by water