ardour vs elan

ardour and elan both are nouns.

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

As nouns, ardour and elan are synonyms defined as:

ardour and elan: a feeling of strong eagerness (usually in favor of a person or cause)

Other synonyms of ardour include ardor, zeal.

ardour (noun)	elan (noun)
intense feeling of love	enthusiastic and assured vigor and liveliness
a feeling of strong eagerness (usually in favor of a person or cause)	distinctive and stylish elegance
feelings of great warmth and intensity	a feeling of strong eagerness (usually in favor of a person or cause)