ardor vs passionateness

ardor and passionateness both are nouns.

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

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

Other hypernyms of ardor include passion.

ardor (noun)	passionateness (noun)
intense feeling of love	a strong feeling or emotion
a feeling of strong eagerness (usually in favor of a person or cause)
feelings of great warmth and intensity