| Synonyms | Length | Vowels | Syllables | |
|---|---|---|---|---|
| Gross | 5 | 4 | 1 | 1 |
| Gutsy | 5 | 4 | 1 | 2 |
| Gutty | 5 | 4 | 1 | 2 |
| Halt | 4 | 3 | 1 | 1 |
| Hardy | 5 | 4 | 1 | 2 |
| Harmful | 7 | 5 | 2 | 2 |
| Hasty | 5 | 4 | 1 | 2 |
| Headlong | 8 | 5 | 3 | 2 |
| Hearty | 6 | 4 | 2 | 2 |
| Hideous | 7 | 3 | 4 | 3 |
| High | 4 | 3 | 1 | 1 |
| High Strung | 11 | 9 | 2 | 2 |
| Highly Emotional | 16 | 10 | 6 | 5 |
| Highly Strung | 13 | 11 | 2 | 3 |
| High Gear | 9 | 6 | 3 | 2 |
| High Mettled | 12 | 9 | 3 | 3 |
| High Spirited | 13 | 9 | 4 | 4 |
| High Strung | 11 | 9 | 2 | 2 |
| High Tasted | 11 | 8 | 3 | 3 |
| Hooligan | 8 | 4 | 4 | 3 |
| Hot | 3 | 2 | 1 | 1 |
| Hotheaded | 9 | 5 | 4 | 3 |
| Hot Tempered | 12 | 8 | 4 | 3 |
| House | 5 | 2 | 3 | 1 |
| Icky | 4 | 3 | 1 | 2 |
| Igneous | 7 | 3 | 4 | 3 |
| Ignitable | 9 | 5 | 4 | 4 |
| Ignitible | 9 | 5 | 4 | 4 |
| Ill Smelling | 12 | 9 | 3 | 3 |
| Impetuous | 9 | 4 | 5 | 4 |
| Impulsive | 9 | 5 | 4 | 3 |
| Incisive | 8 | 4 | 4 | 3 |
| Inflammable | 11 | 7 | 4 | 4 |
| Intense | 7 | 4 | 3 | 3 |
| Intrepid | 8 | 5 | 3 | 3 |

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