ardour vs keenness

ardour and keenness both are nouns.

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

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

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

Other hypernyms of ardour include avidity, avidness, eagerness.

ardour (noun)	keenness (noun)
intense feeling of love	thinness of edge or fineness of point
a feeling of strong eagerness (usually in favor of a person or cause)	a quick and penetrating intelligence
feelings of great warmth and intensity	a positive feeling of wanting to push ahead with something