Federal employees retirement system is a term that refers to the retirement plan for federal government employees of the United States. There are several synonyms for this term that are commonly used. One of the most common synonyms for the federal employees retirement system is FERS, which is an abbreviation of the term. Another synonym is the "Federal Retirement System," which refers to the same plan. Some people may also refer to it as the "Federal Employee Retirement Plan" or simply the "federal retirement program." Regardless of which term is used, they all refer to the retirement benefits provided to federal government employees in the United States.