diet vs Nihon

diet and Nihon both are nouns.

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

diet (noun)	Nihon (noun)
the act of restricting your food intake (or your intake of particular foods)	a constitutional monarchy occupying the Japanese Archipelago; a world leader in electronics and automobile manufacture and ship building
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)

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