Barbuda vs island

Barbuda and island both are nouns.

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

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