| dumb(adjective, dull, simple, ability, silly) |
| half-assed |
| doltish(adjective, ability, stupid) |
| dull(adjective, silly, stupid, green, fat) |
| dense(adjective, dull, simple, ability, silly) |
| dopey(adjective, slang, ability, stupid) |
| foolish(adjective, silly, stupid, green, fat) |
| half-witted(adjective, simple, silly, stupid, green) |
| obtuse(adjective, dull, simple, ability, silly) |
| stupid(adjective, dull, simple, ability, silly) |
| blockheaded(adjective, ability, stupid) |
| brainless(adjective, simple, silly, foolish, stupid) |
| simple(adjective, dull, silly, stupid, intelligent) |
| thick(adjective, dull, simple, ability, informal) |
| thickheaded(adjective, ability, stupid) |
| beaglebrained(adjective, stupid) |
| brain-dead(adjective, stupid) |
| clueless(adjective, stupid) |
| cushion-witted(adjective, stupid) |
| dim(adjective, stupid) |