cleanup vs sanitization

cleanup and sanitization both are nouns.

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

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

cleanup (noun)	sanitization (noun)
the act of making something clean	making something sanitary (free of germs) as by sterilizing
(baseball) the fourth position in the batting order (usually filled by the best batter on the team)
a very large profit