suffering vs wretchedness

suffering and wretchedness both are nouns.

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

As nouns, wretchedness is a hypernym of suffering; that is, wretchedness is a word with a broader meaning than suffering:

Other hypernyms of suffering include miserableness, misery.

suffering (noun)	wretchedness (noun)
feelings of mental or physical pain	the quality of being poor and inferior and sorry
psychological suffering	a state of ill-being due to affliction or misfortune
a state of acute pain	the character of being uncomfortable and unpleasant
misery resulting from affliction

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