blood sport vs hunting

blood sport and hunting both are nouns.

Word	Noun	Adjective	Verb	Adverb
blood sport	Yes	No	No	No
hunting	Yes	No	No	No

As nouns, hunting is a hyponym of blood sport; that is, hunting is a word with a more specific, narrower meaning than blood sport:

blood sport: sport that involves killing animals (especially hunting)
hunting: the pursuit and killing or capture of wild animals regarded as a sport

Other hyponyms of blood sport include bullfighting, tauromachy, cockfighting, hunt.

blood sport (noun)	hunting (noun)
sport that involves killing animals (especially hunting)	the work of finding and killing or capturing animals for food or pelts
	the pursuit and killing or capture of wild animals regarded as a sport
	the activity of looking thoroughly in order to find something or someone