| Abbreviation | Definition |
|---|---|
| FSCS | Faithful Shepherd Catholic School |
| FSCS | Fayetteville Street Christian School |
| FSH | Father, Son, and Holy Spirit |
| FSSJ | Franciscan Sister of Saint Joesph |
| FSSP | Fraternitas Sacerdotalis Sancti Petri (Priestly Fraternity of St. Peter) |
| FTCM | Formation Toward Christian Ministry |
| FTDC | Federação dos Trabalhadores Democrata-Cristãos (Portuguese: Workers Federation of Christian Democrats) |
| FTF | Forward Through Faith |
| FTFG | Free Temple Full Gospel |
| FTFGM | Free Temple Full Gospel Ministries |
| FTFI | Faith To Faith International |
| FTFT | First Timothy Four Twelve |
| FTOM | Faith Tabernacle Outreach Ministries |
| FTW | Faith Through Worship |
| FTW | For The World |
| FU | Future Unity |
| FUCO | First Unitarian Church of Oakland |
| FUEL | Fellowship, Unite, Encourage, Lead |
| FUEL | Filling Up Every Life |
| FUEL | Finding Unity, Exalting Love |