| boring(adjective, dull, dreary, monotonous, colorless) |
| dull(adjective, boring, uninteresting, dreary, monotonous) |
| tiresome(adjective, dull, simple, flat, excite) |
| uninteresting(adjective, dull, boring, monotonous, ordinary) |
| monotonous(adjective, boring, dull, ordinary, dreary) |
| humdrum(adjective, dull, weak, simple, flat) |
| dreary(adjective, dull, simple, flat, excite) |
| prosaic(adjective, dull, weak, simple, flat) |
| insipid(adjective, dull, weak, simple, flat) |
| lifeless(adjective, dull, weak, simple, plain) |
| flat(adjective, dull, weak, simple, plain) |
| vapid(adjective, dull, weak, simple, flat) |
| commonplace(adjective, dull, simple, flat, plain) |
| heavy(adjective, dull, severe, flat, difficult) |
| dead(adjective, dull, weak, simple, flat) |
| jejune(adjective, dull, weak, flat, ordinary) |
| ordinary(adjective, boring, dull, flat) |
| soporific(adjective, dull, flat, ordinary) |
| unexciting(adjective, dull, weak, plain, mild) |
| arid(adjective, dull, flat, stupid, ordinary) |