| Synonyms | Length | Vowels | Syllables | |
|---|---|---|---|---|
| Fitful | 6 | 4 | 2 | 2 |
| Flaky | 5 | 4 | 1 | 2 |
| Flamboyant | 10 | 7 | 3 | 2 |
| Flibbertigibbet | 15 | 10 | 5 | 5 |
| Flickering | 10 | 7 | 3 | 3 |
| Flighty | 7 | 6 | 1 | 2 |
| Flirt | 5 | 4 | 1 | 1 |
| Flirtation | 10 | 6 | 4 | 3 |
| Flirtatious | 11 | 6 | 5 | 4 |
| Flirting | 8 | 6 | 2 | 2 |
| Flitting | 8 | 6 | 2 | 2 |
| Floater | 7 | 4 | 3 | 2 |
| Flossy | 6 | 5 | 1 | 2 |
| Fluctuating | 11 | 7 | 4 | 4 |
| Fluctuation | 11 | 6 | 5 | 4 |
| Fluffy | 6 | 5 | 1 | 2 |
| Fluid | 5 | 3 | 2 | 1 |
| Fluttery | 8 | 6 | 2 | 3 |
| Foamy | 5 | 3 | 2 | 2 |
| Foolhardy | 9 | 6 | 3 | 3 |
| Foolish | 7 | 4 | 3 | 2 |
| Foolish Woman | 13 | 8 | 5 | 4 |
| Freakish | 8 | 5 | 3 | 2 |
| Freaky | 6 | 4 | 2 | 2 |
| Frenzied | 8 | 5 | 3 | 2 |
| Frivolous | 9 | 5 | 4 | 3 |
| Frothy | 6 | 5 | 1 | 2 |
| Fruity | 6 | 4 | 2 | 2 |
| Furious | 7 | 3 | 4 | 3 |
| Gaga | 4 | 2 | 2 | 2 |
| Giddy | 5 | 4 | 1 | 2 |
| Giddy Brained | 13 | 9 | 4 | 3 |
| Giddy Headed | 12 | 8 | 4 | 4 |
| Giddy Pated | 11 | 8 | 3 | 4 |
| Giddy Witted | 12 | 9 | 3 | 4 |

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