The term "d.a." is a colloquial expression that has various synonyms. Some popular alternatives for this term include district attorney, prosecutor, state attorney, public prosecutor, and attorney general. These terms commonly refer to an official working for the government who represents the interests of the state in legal proceedings. Synonyms like DA, prosecutor, and attorney general are often used interchangeably depending on the context of the legal matter being addressed. To conclude, there are many terms that can be used to refer to an official representing the state in legal proceedings, and choosing the right term depends on the context.