Atlantic Ocean vs Shetland Islands

Atlantic Ocean and Shetland Islands both are nouns.

Word	Noun	Adjective	Verb	Adverb
Atlantic Ocean	Yes	No	No	No
Shetland Islands	Yes	No	No	No

Atlantic Ocean (noun)	Shetland Islands (noun)
the 2nd largest ocean; separates North and South America on the west from Europe and Africa on the east	an archipelago of about 100 islands in the North Atlantic off the north coast of Scotland