fare vs diet

fare and diet both are nouns.

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

As nouns, diet is a hyponym of fare; that is, diet is a word with a more specific, narrower meaning than fare:

Other hyponyms of fare include dietary, menu, chow, chuck, eats, grub, board, table, ration.

fare (noun)	diet (noun)
an agenda of things to do	the act of restricting your food intake (or your intake of particular foods)
the food and drink that are regularly served or consumed	a prescribed selection of foods
a paying (taxi) passenger	the usual food and drink consumed by an organism (person or animal)
the sum charged for riding in a public conveyance	a legislative assembly in certain countries (e.g., Japan)

fare (verb)	diet (verb)
eat well	eat sparingly, for health reasons or to lose weight
proceed or get along	follow a regimen or a diet, as for health reasons