Japan vs diet

Japan and diet both are nouns.

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

Japan (noun)	diet (noun)
a constitutional monarchy occupying the Japanese Archipelago; a world leader in electronics and automobile manufacture and ship building	the act of restricting your food intake (or your intake of particular foods)
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	a prescribed selection of foods
	the usual food and drink consumed by an organism (person or animal)
	a legislative assembly in certain countries (e.g., Japan)

Japan (verb)	diet (verb)
	eat sparingly, for health reasons or to lose weight
	follow a regimen or a diet, as for health reasons