| tired(adjective, stupid, ordinary, commonplace, bland) |
| tiresome(adjective, dull, simple, boring, tedious) |
| toneless(adjective, dull, boring, tedious, dreary) |
| tripe(adjective, stupid, ordinary, commonplace, bland) |
| trite(adjective, dull, simple, stupid, ordinary) |
| unchanged(adjective, dull, flat, boring, tedious) |
| unchanging(adjective, dull, flat, boring, tedious) |
| unexciting(adjective, dull, weak, plain, mild) |
| uniform(adjective, dull, flat, boring, tedious) |
| unimaginative(adjective, dull, stupid, ordinary, boring) |
| uninflected(adjective, dull, flat, boring, tedious) |
| uninspired |
| uninspiring(adjective, dull, weak, plain, mild) |
| uninteresting(adjective, dull, weak, simple, plain) |
| unoriginal(adjective, dull, stupid, ordinary, boring) |
| unrelieved(adjective, dull, flat, boring, tedious) |
| unstimulating(adjective, dull, weak, plain, mild) |
| unvaried |
| unvarying(adjective, dull, flat, boring, tedious) |
| vanilla(adjective, dull, weak, plain, mild) |