zeal vs ardor

zeal and ardor both are nouns.

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

As nouns, zeal and ardor are synonyms defined as:

zeal and ardor: a feeling of strong eagerness (usually in favor of a person or cause)

Other synonyms of zeal include ardour, elan.

As nouns, ardor is a hypernym of zeal; that is, ardor is a word with a broader meaning than zeal:

Other hypernyms of zeal include ardour, fervency, fervidness, fervor, fervour, fire.

zeal (noun)	ardor (noun)
prompt willingness	intense feeling of love
a feeling of strong eagerness (usually in favor of a person or cause)	a feeling of strong eagerness (usually in favor of a person or cause)
excessive fervor to do something or accomplish some end	feelings of great warmth and intensity