Synonyms: 2-Social Security Administration (U.S.)  ; 4-S. S. A.  ; 3-SSA  ; 8-United States. Administracion de Seguro Social  ; 7-United States. Dept. of Health and Human Services. Social Security Administration  ; 6-United States. Dept. of Health, Education, and Welfare. Social Security Administration  ; 5-United States. Federal Security Agency. Social Security Administration