| slow(adjective, dull, quiet, weak, easy) |
| soporific(adjective, dull, quiet, flat, slow) |
| spiritless(adjective, dull, weak, easy, sad) |
| stoic(adjective, calm, indifferent, unconcerned, impassive) |
| tommyrot |
| unexciting(adjective, dull, quiet, weak, flat) |
| arid(adjective, dull, flat, ordinary, dry) |
| baloney |
| banal(adjective, dull, weak, simple, plain) |
| banausic(adjective, dull, ordinary, boring, routine) |
| bunkum |
| colorless(adjective, dull, weak, simple, flat) |
| colourless |
| comatose(adjective, dull, quiet, weak, easy) |
| dismal(adjective, dull, flat, ordinary, dry) |
| draggy(adjective, dull, quiet, weak, simple) |
| guff |
| hebetudinous(adjective, dull, slow, informal, heavy) |
| inactive(adjective, action, dull, quiet, weak) |
| indifferent(adjective, calm, dull, cool, weak) |