| Solution | Length | |
|---|---|---|
| 3 letters | ||
| bad | 3 | |
| ill | 3 | |
| 4 letters | ||
| evil | 4 | |
| 5 letters | ||
| radon | 5 | |
| toxic | 5 | |
| 6 letters | ||
| NOCENT | 6 | |
| unsafe | 6 | |
| malign | 6 | |
| septic | 6 | |
| trying | 6 | |
| touchy | 6 | |
| wicked | 6 | |
| 7 letters | ||
| malefic | 7 | |
| noxious | 7 | |
| adverse | 7 | |
| noisome | 7 | |
| tainted | 7 | |
| violent | 7 | |
| vicious | 7 | |
| ruinous | 7 | |
| hurtful | 7 | |
| useless | 7 | |
| 8 letters | ||
| sinister | 8 | |
| inimical | 8 | |
| acidrain | 8 | |
| rigorous | 8 | |
| wretched | 8 | |
| venomous | 8 | |
| scathing | 8 | |
| damaging | 8 | |
| virulent | 8 | |
| untoward | 8 | |
| 9 letters | ||
| acid rain | 9 | |
| WORTHLESS | 9 | |
| injurious | 9 | |
| stressful | 9 | |
| troublous | 9 | |
| malignant | 9 | |
| addiction | 9 | |
| unhealthy | 9 | |
| 10 letters | ||
| UNHYGIENIC | 10 | |
| UNSANITARY | 10 | |
| 11 letters | ||
| UNFAVORABLE | 11 | |
| troublesome | 11 | |
| unhealthful | 11 | |
| deleterious | 11 | |
| UNWHOLESOME | 11 | |
| UNREWARDING | 11 | |
| destructive | 11 | |
| detrimental | 11 | |
| PREJUDICIAL | 11 | |
| 12 letters | ||
| indigestible | 12 | |
| unprofitable | 12 | |
| PESTILENTIAL | 12 | |
| 15 letters | ||
| DISADVANTAGEOUS | 15 | |