In the wrong is used to describe a situation where someone has made a mistake or done something incorrect. There are several synonyms for this phrase, such as incorrect, mistaken, erroneous, misguided, faulted and improper. Incorrect means not accurate or true, while mistaken implies an error in judgment or perception. Erroneous suggests faulty reasoning or information, and misguided implies a mistaken or inappropriate course of action. Faulted is a more formal way of saying in the wrong, and improper suggests actions or behavior that are not socially acceptable. Overall, these synonyms can be used to describe a variety of situations where someone has made a mistake or acted inappropriately.