Indian Ocean vs Comoro Islands

Indian Ocean and Comoro Islands both are nouns.

Word	Noun	Adjective	Verb	Adverb
Indian Ocean	Yes	No	No	No
Comoro Islands	Yes	No	No	No

Indian Ocean (noun)	Comoro Islands (noun)
the 3rd largest ocean; bounded by Africa on the west, Asia on the north, Australia on the east and merging with the Antarctic Ocean to the south	three main islands and numerous islets in the Indian Ocean between Mozambique and Madagascar