| bats in the belfry(expression, adjective, idiom, wild, silly) |
| batty(silly, foolish, unwise, impractical, half-baked) |
| berserk(silly, foolish, unwise) |
| beyond reason(expression, strange, foolish, fantastic, insane) |
| birdbrained(impractical, half-baked, doomed) |
| blockheaded(impractical, half-baked, doomed) |
| boneheaded(impractical, half-baked, doomed) |
| bonkers(silly, foolish, unwise) |
| brainless(impractical, half-baked, doomed) |
| cracked(silly, foolish, unwise) |
| crackpot(impractical, half-baked, doomed) |
| crazed(silly, foolish, unwise) |
| cuckoo(silly, foolish, unwise) |
| daft(silly, foolish, unwise) |
| delirious(silly, foolish, unwise) |
| demented(silly, foolish, unwise) |
| deranged(silly, foolish, unwise) |
| dingy(silly, foolish, unwise) |
| dippy(silly, foolish, unwise) |
| doomed(impractical, half-baked) |