| vapid(adjective, dull, weak, simple, flat) |
| extinct(adjective, dead, late, live, living) |
| languid(adjective, dull, quiet, weak, flat) |
| tiresome(adjective, dull, stupid, dry, boring) |
| cold(adjective, calm, dull, tough, soft) |
| deceased(adjective, dead, late, live, living) |
| empty(adjective, living, things) |
| slow(adjective, dull, quiet, flat, informal) |
| still(adjective, calm, dull, quiet, gentle) |
| apathetic(adjective, calm, dull, quiet, tough) |
| idle(adjective, calm, dull, quiet, gentle) |
| insensible(adjective, dull, quiet, flat, slow) |
| motionless(adjective, calm, quiet, smooth, moving) |
| phlegmatic(adjective, calm, quiet, tough, slow) |
| tame(adjective, dull, simple, flat, low) |
| arid(adjective, dull, excite, stupid, dry) |
| departed(adjective, dead, late, live, living) |
| drab(adjective, dull, weak, simple, soft) |
| dreary(adjective, dull, dry, boring, routine) |
| exanimate(adjective, dead, late, living, death) |