| boring(adjective, dull, quiet, simple, flat) |
| dull(adjective, simple, low, plain, ordinary) |
| ordinary(adjective, dull, simple, plain, common) |
| uninteresting(adjective, dull, common, ordinary, usual) |
| humdrum(adjective, dull, simple, clean, plain) |
| commonplace(adjective, dull, simple, plain, common) |
| tedious(adjective, dull, simple, low, plain) |
| monotonous(adjective, dull, quiet, simple, soft) |
| prosaic(adjective, dull, ordinary, usual, boring) |
| unexceptional(adjective, dull, simple, clean, plain) |
| common(adjective, dull, simple, plain, ordinary) |
| routine(adjective, dull, quiet, simple, flat) |
| unexciting(adjective, dull, quiet, flat, slow) |
| dreary(adjective, dull, gloomy, boring, routine) |
| quiet(adjective, dull, soft, gentle, flat) |
| dry(adjective, dull, simple, clean, plain) |
| slow(adjective, late, behind) |
| smooth(adjective, flat, level, even, plane) |
| undistinguished(adjective, dull, indifferent, ordinary, modest) |
| average(adjective, indifferent, ordinary, modest, mediocre) |