fervidness vs passion

fervidness and passion both are nouns.

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

As nouns, passion is a hypernym of fervidness; that is, passion is a word with a broader meaning than fervidness:

Other hypernyms of fervidness include passionateness.

fervidness (noun)	passion (noun)
feelings of great warmth and intensity	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