Sign out is often used to refer to the act of logging out from an account or service. However, there are some synonyms that can also be used for this purpose. One option is to use "log out," which is commonly used in the context of online accounts. Another synonym is "exit," which can be used to refer to leaving or closing a program or application. "Sign off" is also a viable alternative, particularly in the context of emails or chat messages. Additionally, "logout," "sign off," and "disconnect" can be used interchangeably with sign out, depending on the specific situation.