Caribbean vs Saint Lucia

Caribbean and Saint Lucia both are nouns.

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

Caribbean (noun)	Saint Lucia (noun)
region including the Caribbean Islands	a country on the island of Saint Lucia; gained independence from Great Britain in 1979
an arm of the Atlantic Ocean between North and South America; the origin of the Gulf stream	a volcanic island in the Windward Isles to the south of Martinique