passionateness vs passion

passionateness and passion both are nouns.

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

As nouns, passionateness and passion are synonyms defined as:

passionateness (noun)	passion (noun)
a strong feeling or emotion	the trait of being intensely emotional
	any object of warm affection or devotion
	a strong feeling or emotion
	a feeling of strong sexual desire
	an irrational but irresistible motive for a belief or action
	something that is desired intensely