| unworkable(adjective, silly, impractical, unlikely, unreal) |
| useless(adjective, inapplicable) |
| impracticable(adjective, silly, impractical, unlikely, unreal) |
| blue sky(expression, silly, impractical, unlikely, unreal) |
| floating(silly, impractical, unlikely, unreal, idealistic) |
| gone(silly, impractical, unlikely, unreal, idealistic) |
| half-baked(silly, impractical, unlikely, unreal, idealistic) |
| idealistic(unlikely, improbable) |
| inadaptable(adjective, inapplicable) |
| inoperative(adjective, inapplicable) |
| invalid(adjective, inapplicable) |
| irrelative(adjective, inapplicable) |
| irrelevant(adjective, inapplicable) |
| nonapplicable(adjective, inapplicable) |
| nonsensical(silly, impractical, unlikely, unreal, idealistic) |
| reachy(silly, impractical, unlikely, unreal, idealistic) |
| unadaptable(adjective, inapplicable) |
| unfit(adjective, inapplicable) |
| unrealistic(adjective, practical, unlikely, idealistic, believable) |
| unusable(adjective, inapplicable) |