| spiritless(adjective, dull, weak, flat, stupid) |
| square(adjective, simple, moderate, clean, plain) |
| standard(adjective, dull, simple, moderate, ordinary) |
| tasteless(adjective, weak, plain, mild, insipid) |
| undiversified |
| unpoetic |
| unrelieved(adjective, dull, boring, tedious, dreary) |
| unstimulating(adjective, dull, weak, plain, mild) |
| usual(adjective, dull, moderate, flat, common) |
| vanilla(adjective, dull, weak, simple, clean) |
| watery(adjective, dull, weak, plain, mild) |
| weariful(adjective, excite, informal, boring) |
| wearing(adjective, dull, boring, tedious, irritating) |
| weary(adjective, excite) |
| wishy-washy(adjective, dull, weak, plain, mild) |
| worn-out(simple, flat, common, ordinary, familiar) |
| zero(adjective, dull, weak, simple, lower) |
| abused(adjective, flat, ordinary, dry, boring) |
| accustomed(adjective, ordinary, usual, commonplace, conventional) |
| actual(adjective, simple, clean, plain, ordinary) |