rebound tenderness vs soreness

rebound tenderness and soreness both are nouns.

Word	Noun	Adjective	Verb	Adverb
rebound tenderness	Yes	No	No	No
soreness	Yes	No	No	No

As nouns, soreness is a hypernym of rebound tenderness; that is, soreness is a word with a broader meaning than rebound tenderness:

rebound tenderness: pain felt when a hand pressing on the abdomen is suddenly released; a symptom of peritoneal inflammation
soreness: a pain that is felt (as when the area is touched)

Other hypernyms of rebound tenderness include rawness, tenderness.

rebound tenderness (noun)	soreness (noun)
pain felt when a hand pressing on the abdomen is suddenly released; a symptom of peritoneal inflammation	an uncomfortable feeling of mental painfulness or distress
	a pain that is felt (as when the area is touched)