| unanimated(adjective, dull, boring, uninteresting, uninterested) |
| uninspired(adjective, dull, set, weak, flat) |
| unpalatable(adjective, dull, weak, flat, nasty) |
| unsavory(adjective, dull, weak, flat, nasty) |
| vacant(adjective, dull, flat, indifferent, value) |
| wearying |
| barren(adjective, unprofitable) |
| dismal(adjective, dull, flat, ordinary, dry) |
| foolish |
| lackluster(adjective, dull, simple, flat, clean) |
| mawkish(adjective, soft, sweet, wet, sloppy) |
| mundane(adjective, dull, simple, plain, stupid) |
| plodding |
| ponderous(adjective, tedious, dreary) |
| silly(adjective, dull, soft, slight, flat) |
| slight |
| trivial(adjective, slight, value, small, ordinary) |
| washy(adjective, good, excite, insipid, feebleness) |
| wooden(adjective, flat, cold, boring, tedious) |
| asinine |