cleanup vs scouring

cleanup and scouring both are nouns.

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

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

cleanup: the act of making something clean
scouring: the act of cleaning a surface by rubbing it with a brush and soap and water

cleanup (noun)	scouring (noun)
the act of making something clean	the act of cleaning a surface by rubbing it with a brush and soap and water
(baseball) the fourth position in the batting order (usually filled by the best batter on the team)	moving over territory to search for something
a very large profit