referred pain vs hurting

referred pain and hurting both are nouns.

Word	Noun	Adjective	Verb	Adverb
referred pain	Yes	No	No	No
hurting	Yes	No	No	No

As nouns, hurting is a hypernym of referred pain; that is, hurting is a word with a broader meaning than referred pain:

referred pain: pain that is felt at a place in the body different from the injured or diseased part where the pain would be expected
hurting: a symptom of some physical hurt or disorder

Other hypernyms of referred pain include pain.

referred pain (noun)	hurting (noun)
pain that is felt at a place in the body different from the injured or diseased part where the pain would be expected	a symptom of some physical hurt or disorder