| abominable(adjective, dull, bad, plain, awful) |
| debilitating(adjective, dull, bad, plain, terrible) |
| demoralizing(adjective, dull, bad, plain, terrible) |
| dire(adjective, dull, bad, plain, terrible) |
| discouraging(adjective, dull, bad, plain, terrible) |
| disheartening(adjective, dull, bad, plain, terrible) |
| dispiriting(adjective, dull, bad, plain, terrible) |
| exhausting(adjective, dull, bad, plain, terrible) |
| frightful(adjective, dull, bad, plain, terrible) |
| inferior(adjective, feature, dull, bad, poor) |
| low-grade(adjective, dull, bad, plain, terrible) |
| unexceptional(adjective, feature, dull, bad, poor) |
| abysmal(adjective, dull, bad, plain, terrible) |
| calamitous(adjective, dull, bad, plain, terrible) |
| devastating(adjective, dull, bad, plain, terrible) |
| dismal(adjective, dull, bad, plain, terrible) |
| excruciating(adjective, dull, bad, plain, terrible) |
| fearful(adjective, dull, bad, plain, terrible) |
| grim(adjective, dull, bad, plain, terrible) |
| heinous(adjective, dull, bad, plain, terrible) |