Screwup, also known as a mistake, is a term used to describe an error or fault made by someone in their work or personal life. Some antonyms or opposite words for screwup include success, achievement, victory, and accomplishment. These words denote positive outcomes and the absence of any wrongdoing. They are used to emphasize the opposite of failure and to signify that a person has done something right. Additionally, other antonyms for screwup might include accuracy, precision, expertise, and competence. These terms suggest that the person is skilled, knowledgeable, and capable of performing their task correctly.