| Fluke | fluke |
| Flunke | fluke |
| Fluse | fluff piece of fluff |
| Luke | hatch scuttle |
| Flush | flush |
| Fluß | thread |
| Fluss | river flow fluency flux |
| flügge | fledged |
| Fluch | curse malediction |
| Fluder | flume |
| Flug | flight |
| Fluid | fluid |
| Fluor | fluorine fluor albus whites |
| Fluppe | cig butt coffin-nail fag smoke |
| Flur | corridor hallway hall farmland field |
| Flut | flood-tide flood wave |
| Flügel | wing grand piano |
| flugs | quickly |
| fluten | flood stream pour surge |
| Heuke | mantle |