| Synonyms | Length | Vowels | Syllables | |
|---|---|---|---|---|
| Impoverished | 12 | 7 | 5 | 4 |
| Incapacitated | 13 | 7 | 6 | 6 |
| Ineffective | 11 | 6 | 5 | 4 |
| Ineffectual | 11 | 6 | 5 | 5 |
| Infecund | 8 | 5 | 3 | 3 |
| Infertile | 9 | 5 | 4 | 3 |
| Infirm | 6 | 4 | 2 | 2 |
| Insipid | 7 | 4 | 3 | 3 |
| Invalid | 7 | 4 | 3 | 3 |
| In Poor Health | 14 | 9 | 5 | 3 |
| Issueless | 9 | 5 | 4 | 2 |
| Jejune | 6 | 3 | 3 | 2 |
| Knocked Out | 11 | 7 | 4 | 3 |
| Languishing | 11 | 7 | 4 | 3 |
| Lay Waste To | 12 | 8 | 4 | 4 |
| Leached | 7 | 4 | 3 | 1 |
| Lightened | 9 | 6 | 3 | 2 |
| Livid | 5 | 3 | 2 | 2 |
| Lowbrow | 7 | 5 | 2 | 2 |
| Lowbrowed | 9 | 6 | 3 | 2 |
| Menopausal | 10 | 5 | 5 | 4 |
| Moribund | 8 | 5 | 3 | 3 |
| Nerveless | 9 | 6 | 3 | 2 |
| Nonfertile | 10 | 6 | 4 | 3 |
| Nonproducing | 12 | 8 | 4 | 4 |
| Nonproductive | 13 | 8 | 5 | 4 |
| Nonprolific | 11 | 7 | 4 | 4 |
| Pale | 4 | 2 | 2 | 1 |
| Peaked | 6 | 3 | 3 | 1 |
| Peaky | 5 | 3 | 2 | 2 |
| Peter Out | 9 | 5 | 4 | 3 |
| Picket | 6 | 4 | 2 | 2 |
| Pinched | 7 | 5 | 2 | 1 |
| Played Out | 10 | 6 | 4 | 2 |
| Prohibitionist | 14 | 8 | 6 | 5 |

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