| vapid(adjective, dull, weak, simple, flat) |
| slow(adjective, dull, boring, tedious, dullness) |
| jejune(adjective, dull, flat, ordinary, dry) |
| bland(adjective, dull, weak, plain, mild) |
| routine(adjective, dull, weak, simple, moderate) |
| stupid(adjective, dull, flat, ordinary, dry) |
| uneventful(adjective, dull, simple, clean, plain) |
| arid(adjective, dull, flat, stupid, ordinary) |
| common(adjective, dull, mean, simple, moderate) |
| dead(adjective, dull, simple, flat, plain) |
| ho-hum(adjective, dull, simple, clean, plain) |
| run-of-the-mill(adjective, dull, moderate, flat, common) |
| drab(adjective, dull, simple, clean, plain) |
| hackneyed(adjective, simple, moderate, flat, clean) |
| lifeless(adjective, dull, weak, simple, plain) |
| monotone(noun, adjective, dull, change, excite) |
| monotony(noun, change, excite, informal, routine) |
| prosy(adjective, dull, simple, flat, plain) |
| repetitious(adjective, dull, flat, stupid, ordinary) |
| soporific(adjective, dull, flat, ordinary, dry) |