island vs Barbuda

island and Barbuda both are nouns.

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

island (noun)	Barbuda (noun)
a zone or area resembling an island	an island in Antigua and Barbuda, with largest city Codrington
a land mass (smaller than a continent) that is surrounded by water