Volcano Islands vs Nihon

Volcano Islands and Nihon both are nouns.

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

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