The term PART OF AARP is composed of four solutions: RET (3 letters), AMER (4 letters), ASSN (4 letters), and RETD (4 letters). RET stands for 'Retired, ' AMER stands for 'American, ' ASSN stands for 'ASSOCIATION, ' and RETD stands for 'Retired.' Together, these solutions refer to the American ASSOCIATION of Retired Persons, commonly known as AARP. AARP is a nonprofit organization that provides services and benefits to people over the age of 50.