| Synonyms | Length | Vowels | Syllables | |
|---|---|---|---|---|
| Flightiness | 11 | 8 | 3 | 3 |
| Flip Flop | 9 | 7 | 2 | 2 |
| Fluctuation | 11 | 6 | 5 | 4 |
| Freakishness | 12 | 8 | 4 | 3 |
| Frivolity | 9 | 6 | 3 | 4 |
| Frivolousness | 13 | 8 | 5 | 4 |
| Heterodoxy | 10 | 6 | 4 | 5 |
| Impishness | 10 | 7 | 3 | 3 |
| Impulsiveness | 13 | 8 | 5 | 5 |
| Inconsistency | 13 | 9 | 4 | 5 |
| Inconstancy | 11 | 8 | 3 | 4 |
| Indecision | 10 | 5 | 5 | 4 |
| Indecisiveness | 14 | 8 | 6 | 6 |
| Inequality | 10 | 5 | 5 | 5 |
| Infidelity | 10 | 6 | 4 | 5 |
| Infirmity Of Purpose | 20 | 13 | 7 | 6 |
| Insincerity | 11 | 7 | 4 | 5 |
| Instability | 11 | 7 | 4 | 5 |
| Intermittence | 13 | 8 | 5 | 4 |
| Intermittency | 13 | 9 | 4 | 5 |
| Irregularity | 12 | 7 | 5 | 6 |
| Irresoluteness | 14 | 8 | 6 | 6 |
| Irresolution | 12 | 6 | 6 | 5 |
| Jerkiness | 9 | 6 | 3 | 3 |
| Levity | 6 | 4 | 2 | 3 |
| Licentiousness | 14 | 8 | 6 | 5 |
| Light | 5 | 4 | 1 | 1 |
| Lightness | 9 | 7 | 2 | 2 |
| Lurch | 5 | 4 | 1 | 1 |
| Mala Fides | 10 | 6 | 4 | 3 |
| Mercuriality | 12 | 7 | 5 | 6 |
| Mercurialness | 13 | 8 | 5 | 5 |
| Mischievousness | 15 | 9 | 6 | 4 |
| Moodiness | 9 | 5 | 4 | 3 |
| Motleyness | 10 | 7 | 3 | 3 |

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