Found 4 full forms for WFSI
| Term | Full Form | Category |
|---|---|---|
| WFSI | W. F. Scarince, Incorporated 
| Others |
| WFSI | Wheaton Franciscan Services, Incorporated
| Others |
| WFSI | Wildland Fire Susceptibility Index
| Others |
| WFSI | Worthington Field Studies, Incorporated
| Others |