island vs Saint Lucia

island and Saint Lucia both are nouns.

Word	Noun	Adjective	Verb	Adverb
island	Yes	No	No	No
Saint Lucia	Yes	No	No	No

island (noun)	Saint Lucia (noun)
a zone or area resembling an island	a country on the island of Saint Lucia; gained independence from Great Britain in 1979
a land mass (smaller than a continent) that is surrounded by water	a volcanic island in the Windward Isles to the south of Martinique