| nondescript(adjective, dull, mean, character, rough) |
| insipid(adjective, dull, weak, flat, stupid) |
| ordinary(adjective, dull, common, usual, regular) |
| commonplace(adjective, dull, stupid, ordinary, usual) |
| dull(adjective, mean, weak, stupid, ordinary) |
| featureless(adjective, shapeless, nondescript) |
| amorphous(adjective, character, shape, formless, shapeless) |
| bland |
| boring(adjective, dull, bad, flat, dry) |
| common(adjective, dull, mean, rough, low) |
| colorless(adjective, dull, mean, rough, poor) |
| dry |
| indefinite(adjective, shapeless) |
| mediocre(adjective, dull, mean, weak, simple) |
| pedestrian(adjective, dull, mean, rough, poor) |
| unorganized |
| wishy-washy(adjective, dull, bland) |
| drab(adjective, dull, stupid, boring, tedious) |
| dreary(adjective, dull, boring, tedious, shabby) |
| flat |