| Flummi | bouncy ball |
| Lumme | guillemot |
| Dummi | dummy |
| Gummi | rubber elastic johnny love glove eraser |
| Fluke | fluke |
| Flunke | fluke |
| Fluorid | fluoride |
| Fluorit | fluorite |
| Flush | flush |
| Fluß | thread |
| Fluss | river flow fluency flux |
| flügge | fledged |
| Fluch | curse malediction |
| Flucht | flight |
| Fluder | flume |
| Flug | flight |
| Fluid | fluid |
| Fluor | fluorine fluor albus whites |
| Fluppe | cig butt coffin-nail fag smoke |
| Flur | corridor hallway hall farmland field |