Bouvet Island vs island

Bouvet Island and island both are nouns.

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

Bouvet Island (noun)	island (noun)
an island belonging to Norway in the South Atlantic near the Antarctic Circle	a zone or area resembling an island
	a land mass (smaller than a continent) that is surrounded by water