| boneheaded(adjective, dull, simple, slow, stupid) |
| thick(adjective, dull, ability, slow, informal) |
| fatheaded(adjective, dull, slow, stupid) |
| stupid(adjective, dull, simple, ability, slow) |
| thickheaded(adjective, dull, simple, ability, slow) |
| dense(adjective, dull, simple, ability, slow) |
| doltish(adjective, dull, simple, ability, slow) |
| dumb(adjective, dull, simple, ability, slow) |
| loggerheaded(adjective, simple, stupid) |
| foolish(adjective, foolish, impulsive, impractical, half-baked) |
| dopey(adjective, slang, ability, slow, foolish) |
| brainless(adjective, dull, simple, slow, foolish) |
| crazy(adjective, foolish, impulsive, impractical, half-baked) |
| dim-witted(adjective, slow, foolish, stupid) |
| idiotic(adjective, foolish, impulsive, impractical, half-baked) |
| inane(adjective, foolish, impractical, half-baked, doomed) |
| loony(adjective, foolish, impractical, half-baked, doomed) |
| moronic(adjective, slow, foolish, stupid, impulsive) |
| nonsensical(adjective, foolish, impractical, half-baked, doomed) |
| obtuse(adjective, dull, simple, ability, slow) |