hunting vs scouring

hunting and scouring both are nouns.

Word	Noun	Adjective	Verb	Adverb
hunting	Yes	No	No	No
scouring	Yes	No	No	No

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

hunting: the activity of looking thoroughly in order to find something or someone
scouring: moving over territory to search for something

hunting (noun)	scouring (noun)
the work of finding and killing or capturing animals for food or pelts	the act of cleaning a surface by rubbing it with a brush and soap and water
the pursuit and killing or capture of wild animals regarded as a sport	moving over territory to search for something
the activity of looking thoroughly in order to find something or someone