island vs Singapore

island and Singapore both are nouns.

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

island (noun)	Singapore (noun)
a zone or area resembling an island	a country in southeastern Asia on the island of Singapore; achieved independence from Malaysia in 1965
a land mass (smaller than a continent) that is surrounded by water	an island to the south of the Malay Peninsula
	the capital of Singapore; one of the world's biggest ports