passion vs desire

passion and desire both are nouns.

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

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

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

passion (verb)	desire (verb)
	feel or have a desire for; want strongly
	express a desire for
	expect and wish