Mediterranean vs Sicily

Mediterranean and Sicily both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mediterranean	Yes	Yes	No	No
Sicily	Yes	No	No	No

Mediterranean (noun)	Sicily (noun)
the largest inland sea; between Europe and Africa and Asia	the Italian region on the island of Sicily
	the largest island in the Mediterranean

Mediterranean (adjective)	Sicily (adjective)
of or relating to or characteristic of or located near the Mediterranean Sea