Asia vs Nihon

Asia and Nihon both are nouns.

Word	Noun	Adjective	Verb	Adverb
Asia	Yes	No	No	No
Nihon	Yes	No	No	No

Asia (noun)	Nihon (noun)
the nations of the Asian continent collectively	a constitutional monarchy occupying the Japanese Archipelago; a world leader in electronics and automobile manufacture and ship building
the largest continent with 60% of the earth's population; it is joined to Europe on the west to form Eurasia; it is the site of some of the world's earliest civilizations