| Abbreviation | Definition |
|---|---|
| FEAR | False Expectations Appearing Real |
| FEAR | Fictitious Events Appearing Real |
| FEAR | Future Events Aren't Real |
| FEB | Fellowship of Evangelical Baptists |
| FEBC | First English Baptist Church (Maryland and Pennsylvania) |
| FEC | Future Eternal Companion |
| FECA | Fellowship of Evangelical Churches of Australia |
| FECA | First Evangelical Church Association |
| FELLOWSHIP | Fear of God, Endurance, Love, Light & Glory, One-thing, Worthy, Speech, Humility, Insight unto Intimacy, Peace & Joy |
| FELM | Finish Evangelical Lutheran Mission |
| FELM | Finnish Evangelical Lutheran Mission |
| FEMA | Faith, Effort, Ministry, and Ability |
| FER | Focus, Essence, Relation |
| FFAI | Fellowship For Athletes, Inc. |
| FFB | Frum From Birth |
| FFCLA | First Congregational Church of Los Angeles |
| FFCS | Fellowship of Former Christian Scientists |
| FFCS | Firm Foundation Christian School |
| FFM | Fellowship of Faith for Muslims |
| FFRF | Freedom From Religion Foundation |