| banal(dull, weak, plain, mild, boring) |
| blah(dull, weak, plain, mild, boring) |
| dull(weak, plain, mild, boring, tedious) |
| dull as dishwater(expression, idiom, dull, weak, plain) |
| flat(dull, weak, plain, mild, boring) |
| flavorless(dull, weak, plain, mild, boring) |
| ho hum(expression, dull, weak, plain, mild) |
| humdrum(dull, weak, plain, mild, boring) |
| insipid(dull, weak, plain, mild, boring) |
| milk-and-water(dull, weak, plain, mild, boring) |
| monotonous(dull, weak, plain, mild, boring) |
| nerdy(dull, weak, plain, mild, boring) |
| nothing(dull, weak, plain, mild, boring) |
| pabulum(dull, weak, plain, mild, boring) |
| sapless(dull, weak, plain, mild, boring) |
| tame(dull, weak, plain, mild, boring) |
| tedious(dull, weak, plain, mild, boring) |
| unexciting(dull, weak, plain, mild, boring) |
| uninspiring(dull, weak, plain, mild, boring) |
| uninteresting(dull, weak, plain, mild, boring) |