Shetland Islands vs Atlantic Ocean

Shetland Islands and Atlantic Ocean both are nouns.

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

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