| insipid(adjective, dull, flat, ordinary) |
| longwinded(adjective, flat, stupid, ordinary) |
| monotonous(adjective, dull, flat, ordinary) |
| oft-repeated(adjective, flat, stupid, ordinary) |
| ordinary(adjective, dull, flat, boring) |
| out-of-date(adjective, flat, stupid, ordinary) |
| plain(adjective, dull, flat, stupid, ordinary) |
| pointless(adjective, flat, stupid, ordinary) |
| prolix(adjective, flat, stupid, ordinary) |
| prosaic(adjective, dull, flat, stupid, ordinary) |
| prosy(adjective, dull, flat, stupid, ordinary) |
| repetitious(adjective, flat, stupid, ordinary) |
| repetitive(adjective, flat, stupid, ordinary) |
| routine(adjective, dull, flat, stupid, ordinary) |
| run-of-the-mill(adjective, dull, flat, stupid, ordinary) |
| soporific(adjective, dull, flat, stupid, ordinary) |
| stale(adjective, dull, flat, ordinary) |
| stock(adjective, flat, stupid, ordinary) |
| stupid(adjective, dull, flat, ordinary) |
| tame(adjective, dull, flat, ordinary) |