Jamaica vs island

Jamaica and island both are nouns.

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

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