enthusiasm vs relish

enthusiasm and relish both are nouns.

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

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

Other hyponyms of enthusiasm include gusto, zest, zestfulness, avidity, avidness, eagerness, keenness, exuberance, technophilia.

enthusiasm (noun)	relish (noun)
overflowing with eager enjoyment or approval	the taste experience when a savoury condiment is taken into the mouth
a lively interest	vigorous and enthusiastic enjoyment
a feeling of excitement	spicy or savory condiment

enthusiasm (verb)	relish (verb)
	derive or receive pleasure from; get enjoyment from; take pleasure in