| Flussaue | floodplain |
| Flußlauf | watercourse |
| Flusslauf | race |
| Flusssäure | hydrofluoric acid |
| Fluß | thread |
| Fluss | river flow fluency flux |
| Fluse | fluff piece of fluff |
| Flusshafen | river port |
| Flussufer | river bank riverside |
| Flüsschen | rivulet creek stream |
| flüssig | liquid fluent |
| Fußraum | footwell |
| Aussage | statement stated view |
| Fußnähe | walking distance |
| Poussage | amour paramour |
| Fassade | façade front |
| Flugasche | fly ash |
| Flugfäden | gossamer |
| Flughahn | flying gurnard |
| Flugroute | airway |