| jejune(noun, adjective, dull, weak, flat) |
| ordinary(adjective, dull, boring, everyday, flat) |
| uninspired(adjective, dull, boring, weak, flat) |
| uninspiring(adjective, dull, boring, tedious, flat) |
| pedestrian(adjective, dull, common, ordinary, usual) |
| run-of-the-mill(adjective, dull, flat, common, ordinary) |
| uneventful(adjective, dull, common, ordinary, usual) |
| wearying(adjective, dull, boring, tedious, dreary) |
| arid(adjective, dull, flat, stupid, ordinary) |
| mundane(adjective, boring, dull, usual, obvious) |
| stale(adjective, dull, weak, flat, warm) |
| tiring(adjective, dull, tedious, boring, lifeless) |
| colourless |
| ho-hum(adjective, dull, boring, tedious, dreary) |
| irksome(adjective, dull, excite, stupid, boring) |
| routine(adjective, dull, weak, flat, common) |
| soporific(adjective, dull, flat, ordinary, dry) |
| tame(adjective, dull, weak, flat, plain) |
| common(adjective, ordinary, boring, dull, flat) |
| drab(adjective, dull, weak, stupid, boring) |