Error messages are notifications that are displayed to the user when an error or issue is encountered. There are several different synonyms for the term 'error message' that can be used, depending on the context. Some commonly used synonyms for error message include warning message, alert message, error notification, error report, and error dialog. Each of these terms may be used interchangeably depending on the situation and the system in which the error is being encountered. Regardless of the language used, error messages serve as an important tool for helping users identify and troubleshoot issues they may be experiencing, ultimately leading to a more seamless user experience.