| incoherent(adjective, foolish, stupid, senseless, irrational) |
| incongruous(adjective, foolish, stupid, senseless, irrational) |
| inconsequential(adjective, foolish, stupid, senseless, irrational) |
| inconsistent(adjective, foolish, stupid, senseless, irrational) |
| irrational(adjective, foolish, stupid, senseless, arbitrary) |
| loose(adjective, foolish, stupid, senseless, irrational) |
| mad(adjective, foolish, stupid, senseless, irrational) |
| nonsensical(adjective, foolish, stupid, senseless, irrational) |
| off base cock-eyed |
| off the mark |
| off the wall(expression, adjective, idiom, foolish, stupid) |
| opinionated(adjective, foolish, stupid, senseless, irrational) |
| out of order |
| perverse(irrational, arbitrary) |
| preposterous(adjective, foolish, stupid, senseless, irrational) |
| quirky(adjective, foolish, stupid, senseless, irrational) |
| reasonless(adjective, foolish, stupid, senseless, irrational) |
| senseless(adjective, foolish, stupid, irrational, arbitrary) |
| silly(adjective, foolish, stupid, senseless, irrational) |
| sophistical |