island vs St. Vincent

island and St. Vincent both are nouns.

Word	Noun	Adjective	Verb	Adverb
island	Yes	No	No	No
St. Vincent	Yes	No	No	No

island (noun)	St. Vincent (noun)
a zone or area resembling an island	an island in the center of the Windward Islands; the largest of the islands comprising Saint Vincent and the Grenadines
a land mass (smaller than a continent) that is surrounded by water