| batty(adjective, keen, warm, slow, wild) |
| beyond all reason(expression, idiom, silly, foolish, fantastic) |
| beyond belief(expression, extraordinary, amazing, incredible) |
| bizarre(adjective, careless, silly, foolish, stupid) |
| brash(careless, wild, silly, crazy, thoughtless) |
| carefree(careless, wild, thoughtless, daring, deed) |
| changeable(adjective, careless, wild, excited, foolish) |
| childish |
| cockamamy(silly, foolish, thoughtless, unwise, unintelligent) |
| cracked(adjective, wild, silly, foolish, stupid) |
| cranky |
| crotchety |
| death-defying |
| delirious(silly, foolish, unwise) |
| deranged(adjective, wild, silly, foolish, stupid) |
| derisory(silly, foolish, fantastic, unwise, half-baked) |
| determined(careless, thoughtless, impulsive, reckless, hasty) |
| devil-may-care(adjective, careless, wild, foolish, immoral) |
| dilly |
| ditzy(adjective, careless, inconstant, giddy) |