readiness vs zeal

readiness and zeal both are nouns.

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

As nouns, readiness and zeal are synonyms defined as:

Other synonyms of readiness include eagerness, forwardness.

readiness (noun)	zeal (noun)
prompt willingness	prompt willingness
a natural effortlessness	a feeling of strong eagerness (usually in favor of a person or cause)
(psychology) being temporarily ready to respond in a particular way	excessive fervor to do something or accomplish some end
the state of having been made ready or prepared for use or action (especially military action)