Sardinia vs Mediterranean

Sardinia and Mediterranean both are nouns.

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

Sardinia (noun)	Mediterranean (noun)
the Italian region on the island of Sardinia; the kingdom of Sardinia was the nucleus for uniting Italy during the 19th century	the largest inland sea; between Europe and Africa and Asia
an island in the Mediterranean to the west of Italy

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