| Synonyms | Length | Vowels | Syllables | |
|---|---|---|---|---|
| Heterodoxy | 10 | 6 | 4 | 5 |
| Hexadecimal Number System | 25 | 17 | 8 | 9 |
| Hexadecimal System | 18 | 12 | 6 | 7 |
| Hickey | 6 | 4 | 2 | 2 |
| Hitch | 5 | 4 | 1 | 1 |
| Hold | 4 | 3 | 1 | 1 |
| Hole | 4 | 2 | 2 | 1 |
| Howler | 6 | 4 | 2 | 2 |
| Human Error | 11 | 7 | 4 | 4 |
| Hustle | 6 | 4 | 2 | 2 |
| Hylotheism | 10 | 7 | 3 | 4 |
| Ignominy | 8 | 5 | 3 | 4 |
| Illusion | 8 | 4 | 4 | 3 |
| Immoderately | 12 | 7 | 5 | 5 |
| Immorality | 10 | 6 | 4 | 5 |
| Impeach | 7 | 4 | 3 | 2 |
| Imperfection | 12 | 7 | 5 | 4 |
| Imperfectness | 13 | 9 | 4 | 4 |
| Impropriety | 11 | 7 | 4 | 6 |
| Impugn | 6 | 4 | 2 | 2 |
| Inaccuracy | 10 | 6 | 4 | 5 |
| Inadequacy | 10 | 5 | 5 | 5 |
| Inadequateness | 14 | 7 | 7 | 6 |
| Incision | 8 | 4 | 4 | 3 |
| Incorrect | 9 | 6 | 3 | 3 |
| Incorrectly | 11 | 8 | 3 | 4 |
| Incorrectness | 13 | 9 | 4 | 4 |
| Incriminate | 11 | 6 | 5 | 4 |
| Indecorum | 9 | 5 | 4 | 4 |
| Indiscretion | 12 | 7 | 5 | 4 |
| Inexpiable Sin | 14 | 8 | 6 | 6 |
| Infamy | 6 | 4 | 2 | 3 |
| Infirmity | 9 | 6 | 3 | 4 |
| Information | 11 | 6 | 5 | 4 |
| Infraction | 10 | 6 | 4 | 3 |

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