| dodgy(adjective, risky, treacherous, unsafe, hazardous) |
| fell(adjective, strong, tough, severe, intense) |
| hostile(adjective, hard, evil, rough, nasty) |
| ill(adjective, unstable, shaky, insane, unhealthy) |
| mortal(adjective, hazardous, troubling) |
| pressing(adjective, hazardous, troubling) |
| slippery(adjective, delicate, uncertain, unstable, doubtful) |
| unpredictable(noun, adjective, unstable, volatile, risky) |
| urgent(adjective, severe, significant, serious, vital) |
| vicious(adjective, bad, strong, hard, wrong) |
| virulent(adjective, wicked, rotten, harmful, fatal) |
| brutal(adjective, strong, violent, menacing, fatal) |
| dire(adjective, significant, serious, vital, menacing) |
| fraught with danger(expression, adjective, idiom, delicate, uncertain) |
| hard(adjective, tough, severe, evil, rough) |
| hot(adjective, bad, informal, heavy, risky) |
| malicious(adjective, bad, hard, evil, rough) |
| malign(adjective, strong, hard, severe, evil) |
| minatory(adjective, critical, threatening, forbidding, denunciatory) |
| nocuous(adjective, cruel, unkind, distressing, harmful) |