Pacific Ocean vs Coral Sea

Pacific Ocean and Coral Sea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pacific Ocean	Yes	No	No	No
Coral Sea	Yes	No	No	No

Pacific Ocean (noun)	Coral Sea (noun)
the largest ocean in the world	a Japanese defeat in World War II (May 1942); the first naval battle fought entirely by planes based on aircraft carriers
	an arm of the South Pacific to the northeast of Australia