There are numerous synonyms for the phrase "straighten out." Some of the most common synonyms include rectify, resolve, correct, fix, sort out, iron out, make right, set straight, clean up, make amends, make good, mend, put in order, and clear up. Each of these synonyms refers to the act of correcting a mistake, resolving a problem, or setting things right. Whether you are straightening out a personal issue or a professional one, it's important to find the right words to convey your intentions effectively. Thankfully, with so many synonyms available, it's easy to do just that.