Nippon vs Volcano Islands

Nippon and Volcano Islands both are nouns.

Word	Noun	Adjective	Verb	Adverb
Nippon	Yes	No	No	No
Volcano Islands	Yes	No	No	No

Nippon (noun)	Volcano Islands (noun)
a constitutional monarchy occupying the Japanese Archipelago; a world leader in electronics and automobile manufacture and ship building	a group of Japanese Islands in the northwestern Pacific Ocean to the north of the Marianas