| Abbreviation | Definition |
|---|---|
| SLPV | South Londonderry Protestant Volunteers |
| SLS | Savior of Lost Souls |
| SLT | Spiritual Leadership Team |
| SLU | Saint Louis University |
| SLW | Sisters of the Living Word |
| SLY | Silverdale Lutheran Youth |
| SLY | St Lawrence Youth |
| SLY | St Luke's Youth |
| SLY | St. Luke's Youth |
| SM | Scripture Mastery |
| SMA | Shadrach, Meschach, and Abednigo |
| SMA | So Many Angels |
| SMART | Student Missionary Apprentice Reality Training |
| SMBA | San Marcos Baptist Academy |
| SMBC | South Main Baptist Church |
| SMBC | Sydney Missionary and Bible College |
| SMBC | Sydney Missionary Bible College |
| SMBT | Shawnee Mission Baptist Temple |
| SMCC | St Mary Catholic Central |
| SMCC | Syro Malabar Catholic Congress |