| dull(adjective, hard, weak, simple, flat) |
| dreary(adjective, dull, blue, sad, unhappy) |
| gloomy(adjective, dull, blue, sad, unhappy) |
| dark(adjective, calm, dull, quiet, soft) |
| dingy(adjective, dull, soft, obscure, lead) |
| somber(adjective, calm, dull, quiet, soft) |
| dismal(adjective, dull, soft, obscure, flat) |
| murky(adjective, dull, soft, obscure, flat) |
| depressing(adjective, dull, blue, sad, unhappy) |
| dun(adjective, dull, soft, obscure, flat) |
| dispiriting(adjective, dull, unhappy, dark, gloomy) |
| bleak(adjective, dull, unhappy, dark, gloomy) |
| disconsolate(adjective, dull, blue, sad, unhappy) |
| desolate(adjective, dull, blue, sad, unhappy) |
| sad(adjective, depressing, dull, unhappy, dark) |
| indistinct(adjective, dull, soft, obscure, flat) |
| bad(adjective, dull, sad, dark, common) |
| cloudy(adjective, dull, soft, obscure, flat) |
| dusky(adjective, dull, soft, obscure, lead) |
| grimy(adjective, dull, soft, obscure, flat) |