dietary vs fare

dietary and fare both are nouns.

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

As nouns, fare is a hypernym of dietary; that is, fare is a word with a broader meaning than dietary:

dietary (noun)	fare (noun)
a regulated daily food allowance	an agenda of things to do
	the food and drink that are regularly served or consumed
	a paying (taxi) passenger
	the sum charged for riding in a public conveyance

dietary (adjective)	fare (adjective)
of or relating to the diet

dietary (verb)	fare (verb)
	eat well
	proceed or get along