| Flat | flat |
| Flag | flag |
| Flattern | shimmy |
| flattern | flutter |
| Flak | flak |
| Flatrate | flatrate |
| flau | weak |
| Flair | flair bill |
| Flatulist | flatulist |
| Flame | Fleming flame |
| Flare | solar flare stellar flare lens flare |
| Flatulenz | flatulence |
| Flaum | fluff |
| Flaute | calm lull slack period slackness |
| Unflat | ordure |
| flach | flat shallow |
| flatulent | flatulent |
| Lats | lat |
| Plato | Plato |
| Platt | East Frisian Low German dialect |
| platt | flat bromidic unglossed flabbergasted |