| dim(adjective, simple, slow, stupid, intelligent) |
| obtuse(adjective, dull, slow, stupid, insensitive) |
| boorish(adjective, dull, slow, stupid) |
| dense(adjective, dull, slow, stupid, insensitive) |
| dim-witted(adjective, dull, slow, stupid) |
| doltish(adjective, dull, slow, stupid) |
| dopey(adjective, dull, insensitive, stolid, simple-minded) |
| dull(adjective, stupid, insensitive, simple-minded, dull-witted) |
| dumb(adjective, dull, slow, stupid, insensitive) |
| imperceptive(adjective, dull, insensitive, stolid, simple-minded) |
| oafish(adjective, dull, slow, stupid) |
| opaque(adjective, dull, insensitive, stolid, simple-minded) |
| slow(adjective, dull, stupid) |
| stolid(adjective, dull, insensitive, simple-minded, dull-witted) |
| stupid(adjective, dull, slow, insensitive, simple-minded) |
| thick(adjective, dull, slow, stupid, insensitive) |
| uncomprehending(adjective, dull, insensitive, stolid, simple-minded) |
| unintelligent(adjective, dull, insensitive, stolid, simple-minded) |
| weak-minded(adjective, dull, slow, stupid) |