| Synonyms | Length | Vowels | Syllables | |
|---|---|---|---|---|
| Inconclusive | 12 | 7 | 5 | 4 |
| Incongruous | 11 | 6 | 5 | 4 |
| Inconsequent | 12 | 7 | 5 | 4 |
| Inconsequential | 15 | 8 | 7 | 5 |
| Inconsistent | 12 | 8 | 4 | 4 |
| Insincere | 9 | 5 | 4 | 3 |
| Insubstantial | 13 | 8 | 5 | 4 |
| Intuitive | 9 | 4 | 5 | 3 |
| Invalid | 7 | 4 | 3 | 3 |
| In Error | 8 | 5 | 3 | 3 |
| Irrational | 10 | 5 | 5 | 4 |
| Irregular | 9 | 5 | 4 | 4 |
| Jansenist | 9 | 6 | 3 | 3 |
| Jansenistic | 11 | 7 | 4 | 4 |
| Jesuit | 6 | 3 | 3 | 2 |
| Jesuitic | 8 | 4 | 4 | 3 |
| Jesuitical | 10 | 5 | 5 | 4 |
| Jovinianist | 11 | 6 | 5 | 5 |
| Jovinianistic | 13 | 7 | 6 | 6 |
| Knavish | 7 | 5 | 2 | 2 |
| Legal Injury | 12 | 8 | 4 | 5 |
| Lollard | 7 | 5 | 2 | 2 |
| Loose | 5 | 2 | 3 | 1 |
| Loosen | 6 | 3 | 3 | 2 |
| Lopsided | 8 | 5 | 3 | 3 |
| Mad | 3 | 2 | 1 | 1 |
| Manichaean | 10 | 5 | 5 | 4 |
| Manichean | 9 | 5 | 4 | 3 |
| Manichee | 8 | 4 | 4 | 3 |
| Manifest | 8 | 5 | 3 | 3 |
| Maverick | 8 | 5 | 3 | 3 |
| Meretricious | 12 | 6 | 6 | 4 |
| Misleading | 10 | 6 | 4 | 3 |
| Misrepresented | 14 | 9 | 5 | 5 |
| Monophysite | 11 | 7 | 4 | 4 |

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