| formless(adjective, character, vague, shapeless) |
| indeterminate(adjective, dull, character, ordinary, vague) |
| jejune |
| lifeless(adjective, dull, flat, stupid, tedious) |
| namby-pamby(adjective, dull, weak, feeble, tasteless) |
| prosaic(adjective, dull, common, stupid, ordinary) |
| shapeless(adjective, character, vague, formless, shapeless) |
| spiritless(adjective, dull, weak, stupid, feeble) |
| tedious(adjective, dull, flat, stupid, boring) |
| unexceptional(adjective, dull, ordinary, usual, obvious) |
| uninteresting(adjective, dull, common, stupid, ordinary) |
| weak |
| banal |
| chaotic(adjective, shapeless) |
| dead(adjective, dull, flat, stupid, tedious) |
| effete |
| everyday(adjective, dull, indifferent, ordinary, modest) |
| ho-hum(adjective, dull, disagreeable, bland, uninteresting) |
| null(adjective, ineffectual, valueless) |
| run-of-the-mill(adjective, common, ordinary, usual, regular) |