suffering vs Passion

suffering and Passion both are nouns.

Word	Noun	Adjective	Verb	Adverb
suffering	Yes	Yes	No	No
Passion	Yes	No	No	No

As nouns, Passion is a hyponym of suffering; that is, Passion is a word with a more specific, narrower meaning than suffering:

Other hyponyms of suffering include throe, Passion of Christ.

suffering (noun)	Passion (noun)
feelings of mental or physical pain	the suffering of Jesus at the Crucifixion
psychological suffering
a state of acute pain
misery resulting from affliction

suffering (adjective)	Passion (adjective)
troubled by pain or loss
very unhappy; full of misery