clean up vs straighten out

clean up and straighten out both are verbs.

Word	Noun	Adjective	Verb	Adverb
clean up	No	No	Yes	No
straighten out	No	No	Yes	No

As verbs, clean up and straighten out are synonyms defined as:

Other synonyms of clean up include neaten, square away, straighten, tidy, tidy up.

clean up (verb)	straighten out (verb)
make oneself clean, presentable or neat	put (things or places) in order
put (things or places) in order	settle or put right
finish attending to	change for the better
make a big profit; often in a short period of time	make free from confusion or ambiguity; make clear
	make straight
	extricate from entanglement