| eccentric(adjective, characteristic, foolishness, silliness) |
| fatuous(adjective, characteristic, foolishness, silliness) |
| foolhardy(adjective, characteristic, foolishness, silliness) |
| half-baked(adjective, characteristic, foolishness, silliness) |
| half-witted(adjective, characteristic, foolishness, silliness) |
| harebrained(adjective, characteristic, foolishness, silliness) |
| ill-conceived(adjective, characteristic, foolishness, silliness) |
| impracticable(adjective, characteristic, foolishness, silliness) |
| imprudent(adjective, characteristic, foolishness, silliness) |
| inappropriate(adjective, characteristic, foolishness, silliness) |
| insane(adjective, characteristic, foolishness, silliness) |
| irresponsible(adjective, characteristic, foolishness, silliness) |
| moronic(adjective, characteristic, foolishness, silliness) |
| odd(adjective, characteristic, foolishness, silliness) |
| out of all reason(expression, characteristic, foolishness, silliness) |
| outrageous(adjective, characteristic, foolishness, silliness) |
| peculiar(adjective, characteristic, foolishness, silliness) |
| puerile(adjective, characteristic, foolishness, silliness) |
| quixotic(adjective, characteristic, foolishness, silliness) |
| short-sighted(adjective, characteristic, foolishness, silliness) |