| flat(adjective, dull, weak, simple, plain) |
| jejune(adjective, dull, flat, stupid, ordinary) |
| stale(adjective, dull, simple, flat, clean) |
| banal(adjective, dull, weak, simple, clean) |
| dead(adjective, dull, simple, flat, plain) |
| run-of-the-mill(adjective, dull, flat, stupid, ordinary) |
| tame(adjective, dull, weak, simple, flat) |
| wearisome(adjective, dull, tedious, weak, mild) |
| dry(adjective, dull, simple, flat, clean) |
| mundane |
| plain(adjective, dull, weak, simple, flat) |
| prose(adjective, simple, clean, plain, ordinary) |
| unexceptional(adjective, humdrum, dull, simple, clean) |
| unimaginative(adjective, dull, simple, flat, plain) |
| unmotivated(adjective, uninspired) |
| usual(adjective, flat, ordinary, dry, boring) |
| barren(adjective, unprofitable) |
| blah(adjective, dull, weak, simple, flat) |
| characterless |
| colourless |