sanitization vs cleanup

sanitization and cleanup both are nouns.

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

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

Other hypernyms of sanitization include cleaning, cleansing.

sanitization (noun)	cleanup (noun)
making something sanitary (free of germs) as by sterilizing	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