zest vs relish

zest and relish both are nouns.

Word	Noun	Adjective	Verb	Adverb
zest	Yes	No	Yes	No
relish	Yes	No	Yes	No

As nouns, zest and relish are synonyms defined as:

Other synonyms of zest include gusto, zestfulness.

zest (noun)	relish (noun)
a tart spicy quality	the taste experience when a savoury condiment is taken into the mouth
vigorous and enthusiastic enjoyment	vigorous and enthusiastic enjoyment
	spicy or savory condiment

zest (verb)	relish (verb)
add herbs or spices to	derive or receive pleasure from; get enjoyment from; take pleasure in