| Flüstertüte | megaphone |
| Flüstern | whisper |
| flüstern | whisper susurrate |
| Flüsterpost | Chinese whispers |
| Filtertüte | filter bag |
| Flugroute | airway |
| Flussgott | river god |
| Flugente | Muscovy Duck |
| Flugverbot | flying ban |
| Flussbett | riverbed river bed |
| plustern | fluff |
| Cluster | cluster Cluster |
| Kluster | cluster |
| Lüster | chandelier |
| lüstern | lascivious |
| Austerlitz | Austerlitz |
| Austerity | austerity |
| Austerität | austerity |
| Fensterkitt | putty |
| Fenstertag | long weekend |