Japan vs karate

Japan and karate both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japan	Yes	No	No	No
karate	Yes	No	No	No

Japan (noun)	karate (noun)
a constitutional monarchy occupying the Japanese Archipelago; a world leader in electronics and automobile manufacture and ship building	a traditional Japanese system of unarmed combat; sharp blows and kicks are given to pressure-sensitive points on the body of the opponent
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