ardour vs eagerness

ardour and eagerness both are nouns.

Word	Noun	Adjective	Verb	Adverb
ardour	Yes	No	No	No
eagerness	Yes	No	No	No

As nouns, eagerness is a hypernym of ardour; that is, eagerness is a word with a broader meaning than ardour:

ardour: a feeling of strong eagerness (usually in favor of a person or cause)
eagerness: a positive feeling of wanting to push ahead with something

Other hypernyms of ardour include avidity, avidness, keenness.

ardour (noun)	eagerness (noun)
intense feeling of love	prompt willingness
a feeling of strong eagerness (usually in favor of a person or cause)	a positive feeling of wanting to push ahead with something
feelings of great warmth and intensity