| Floßsack | dinghy |
| Fußsack | apron |
| Fresssack | glutton |
| Süßsack | sugar apple |
| Fress-Sack | pig |
| Flashback | flashback |
| Flößer | raftsman |
| Floristik | floristics floristry |
| Flosse | fin flipper mitt |
| Floß | raft float |
| Glossar | glossary |
| Fossa | fossa |
| Flussspat | fluorspar |
| Flusssäure | hydrofluoric acid |
| Flussaue | floodplain |
| Gassack | gasbag |
| Boxsack | punching bag |
| Fettsack | fatso |
| Fotolack | photoresist |
| Float | float |