island vs Catalina Island

island and Catalina Island both are nouns.

Word	Noun	Adjective	Verb	Adverb
island	Yes	No	No	No
Catalina Island	Yes	No	No	No

island (noun)	Catalina Island (noun)
a zone or area resembling an island	an island resort in the Pacific off the southwestern coast of California
a land mass (smaller than a continent) that is surrounded by water