avidity vs zeal

avidity and zeal both are nouns.

Word	Noun	Adjective	Verb	Adverb
avidity	Yes	No	No	No
zeal	Yes	No	No	No

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

Other hyponyms of avidity include ardor, ardour, elan.

avidity (noun)	zeal (noun)
a positive feeling of wanting to push ahead with something	prompt willingness
	a feeling of strong eagerness (usually in favor of a person or cause)
	excessive fervor to do something or accomplish some end