ardour vs ardor

ardour and ardor both are nouns.

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

As nouns, ardour and ardor are synonyms defined as:

As nouns, ardour and ardor are synonyms defined as:

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

Other synonyms of ardour include elan, zeal.

As nouns, ardour and ardor are synonyms defined as:

Other synonyms of ardour include fervency, fervidness, fervor, fervour, fire.

ardour (noun)	ardor (noun)
intense feeling of love	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)
feelings of great warmth and intensity	feelings of great warmth and intensity