island vs Santiago

island and Santiago both are nouns.

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

island (noun)	Santiago (noun)
a zone or area resembling an island	a naval battle in the Spanish-American War (1898); the United States fleet bottled up the Spanish ships in the harbor of Santiago de Cuba and destroyed them when they tried to escape
a land mass (smaller than a continent) that is surrounded by water	the capital and largest city of Chile; located in central Chile; one of the largest cities in South America
	a port city in southeastern Cuba; industrial center
	city in the northern Dominican Republic
	largest of the Cape Verde Islands in the Atlantic Ocean