island vs Sombrero

island and Sombrero both are nouns.

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

island (noun)	Sombrero (noun)
a zone or area resembling an island	one of the islands of Saint Christopher-Nevis, with a land area of 94 acres
a land mass (smaller than a continent) that is surrounded by water