| Flex | angle grinder |
| Flexur | flexure |
| Flexion | inflection inflexion |
| flexibel | flexible inflectable |
| Alex | Al Alec Alex Lex Sandy Xander Lexa Lexy |
| Ilex | holly |
| Fleck | stain spot place patch piece |
| Reflex | reflex |
| Silex | flint |
| Telex | telex |
| Fleece | fleece |
| Flehen | entreaty |
| flehen | implore entreat supplicate |
| Flegel | bugger yahoo flail |
| Fleiß | industriousness |
| Pflege | care nursing |
| Ulexit | ulexite |
| Alexis | Alexis |
| Lexem | lexeme |
| Lexik | vocabulary lexis |