scrubbing vs cleanup

scrubbing and cleanup both are nouns.

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

As nouns, cleanup is a hypernym of scrubbing; that is, cleanup is a word with a broader meaning than scrubbing:

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

Other hypernyms of scrubbing include cleaning, cleansing.

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