island vs Jamaica

island and Jamaica both are nouns.

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

island (noun)	Jamaica (noun)
a zone or area resembling an island	a country on the island of Jamaica; became independent of England in 1962; much poverty; the major industry is tourism
a land mass (smaller than a continent) that is surrounded by water	an island in the West Indies to the south of Cuba and to the west of Haiti