| Abbreviation | Definition |
|---|---|
| SSD | Slick Swift Demon |
| SSE | Society of Saint Edmund |
| SSEC | South Seas Evangelical Church |
| SSEM | South Seas Evangelical Mission |
| SSF | Society of St Francis |
| SSJ | Sisters of St. Joseph |
| SSJCC | Sisters of Saint Joseph College Consortium |
| SSM | Societas Sancti Michaeli (Society of St. Michael) |
| SSM | SouthSide Ministries |
| SSND | School Sisters of Notre Dame |
| SSOT | Summer School of Truth |
| SSP | Spritual Strategic Planning |
| SSPB | Sunday School Publishing Board |
| SSPJ | Saints Philip and James |
| SSPT | Spiritual Strategic Planning Team |
| SSPV | Society of St. Pius V |
| SSPX | Society of St. Pius X |
| SSQ | Science and the Spiritual Quest |
| SSS | Sanitas, Sanctitas, and Scientia |
| SSSR | Society for the Scientific Study of Religion |