cleanup vs cleansing

cleanup and cleansing both are nouns.

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

As nouns, cleanup and cleansing are synonyms defined as:

Other synonyms of cleanup include cleaning.

cleanup (noun)	cleansing (noun)
the act of making something clean	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

cleanup (adjective)	cleansing (adjective)
	acting like an antiseptic
	cleansing the body by washing; especially ritual washing of e.g. hands