Pacific vs Japanese Archipelago

Pacific and Japanese Archipelago both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pacific	Yes	Yes	No	No
Japanese Archipelago	Yes	No	No	No

Pacific (noun)	Japanese Archipelago (noun)
the largest ocean in the world	a string of more than 3,000 islands to the east of Asia extending 1,300 miles between the Sea of Japan and the western Pacific Ocean

Pacific (adjective)	Japanese Archipelago (adjective)
relating to or bordering the Pacific Ocean