| Synonyms | Length | Vowels | Syllables | |
|---|---|---|---|---|
| Harmful | 7 | 5 | 2 | 2 |
| Harsh | 5 | 4 | 1 | 1 |
| Hatchet Job | 11 | 8 | 3 | 3 |
| Heavy | 5 | 3 | 2 | 2 |
| Hefty | 5 | 4 | 1 | 2 |
| Hit | 3 | 2 | 1 | 1 |
| Ho Hum | 6 | 4 | 2 | 2 |
| Home Thrust | 11 | 8 | 3 | 3 |
| Horrendous | 10 | 6 | 4 | 3 |
| Horribly | 8 | 6 | 2 | 3 |
| Horrific | 8 | 5 | 3 | 3 |
| Hostile Criticism | 17 | 11 | 6 | 7 |
| Hypercriticalness | 17 | 12 | 5 | 6 |
| Hypercriticism | 14 | 10 | 4 | 6 |
| Imploring | 9 | 6 | 3 | 3 |
| Importunate | 11 | 6 | 5 | 4 |
| Importunateness | 15 | 9 | 6 | 6 |
| Importune | 9 | 5 | 4 | 3 |
| Importunity | 11 | 7 | 4 | 5 |
| Infectious | 10 | 5 | 5 | 4 |
| Infective | 9 | 5 | 4 | 3 |
| Injurious | 9 | 4 | 5 | 4 |
| Inoculable | 10 | 5 | 5 | 5 |
| Insalubrious | 12 | 6 | 6 | 5 |
| Insanitary | 10 | 6 | 4 | 5 |
| Insist | 6 | 4 | 2 | 2 |
| Insistent | 9 | 6 | 3 | 3 |
| Irking | 6 | 4 | 2 | 2 |
| Irksome | 7 | 4 | 3 | 2 |
| Irritant | 8 | 5 | 3 | 3 |
| Irritating | 10 | 6 | 4 | 4 |
| Irritation | 10 | 5 | 5 | 4 |
| Irritative | 10 | 5 | 5 | 4 |
| Jibe | 4 | 2 | 2 | 1 |
| Keen | 4 | 2 | 2 | 1 |

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