island vs Kyushu

island and Kyushu both are nouns.

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

island (noun)	Kyushu (noun)
a zone or area resembling an island	the southernmost of the four main islands of Japan; contains coal fields
a land mass (smaller than a continent) that is surrounded by water