| run-of-the-mill(adjective, dry, boring, tedious, dreary) |
| slack(adjective, dull, quiet, flat, slow) |
| tired(adjective, dull, careless, indifferent, dry) |
| unanimated(adjective, dull, boring, late, uninteresting) |
| unconscious(adjective, cold, useful, fixed, unresponsive) |
| unexciting(adjective, dull, quiet, weak, flat) |
| wooden(adjective, dull, spiritless) |
| dopey(adjective, dull, flat, low, sad) |
| glassy(adjective, expressionless, especially) |
| hollow(adjective, dull, stiff, impassive, uninteresting) |
| insensate(adjective, living, insensible, things, comatose) |
| lumpish(adjective, dull, slow, heavy, sluggish) |
| materialistic(feature, person, spirit) |
| pale(adjective, weak, feeble, white, colorless) |
| prosy(adjective, dull, weak, simple, tough) |
| quiescent(adjective, calm, quiet, gentle, indifferent) |
| reposing(adjective, inert) |
| sedentary(adjective, inactive, inert) |
| stodgy(adjective, dull, flat, excite, stupid) |
| tepid(adjective, dull, warm, boring, uninteresting) |