| dull(noun, adjective, dull, simple, sharp) |
| dense(adjective, dull, simple, ability, slow) |
| stupid(adjective, dull, simple, ability, slow) |
| thick(adjective, dull, simple, ability, slow) |
| stolid(noun, adjective, dull, simple, slow) |
| doltish(verb, adjective, dull, simple, ability) |
| slow(adjective, dull, simple, heavy, silly) |
| dim(adjective, dull, simple, slow, foolish) |
| half-assed |
| dumb(adjective, dull, simple, ability, slow) |
| blunt(adjective, dull, sharp, flat, heavy) |
| dim-witted(adjective, dull, simple, slow, stupid) |
| slow-witted(adjective, dull, slow, stupid, impassive) |
| insensitive(noun, adjective, dull, hard, slow) |
| thickheaded(adjective, simple, ability, slow, stupid) |
| rounded(adjective, sharp, blunt) |
| unintelligent(adjective, dull, simple, slow, silly) |
| dull-witted |
| simple(adjective, dull, slow, silly, foolish) |
| mindless(adjective, dull, simple, careless, silly) |