| impossible(silly, impractical, unlikely, idealistic, improbable) |
| impractical(silly, unlikely, unreal, idealistic, improbable) |
| improbable(silly, impractical, unlikely, idealistic) |
| ivory-tower(silly, impractical, unlikely, unreal, idealistic) |
| naive(unlikely, idealistic, improbable) |
| nonrealistic(silly, impractical, unlikely, unreal, idealistic) |
| not sensible(expression, silly, impractical, unlikely, unreal) |
| on cloud nine(expression, idiom, silly, unlikely, unreal) |
| quixotic(silly, impractical, unlikely, unreal, idealistic) |
| romantic(unlikely, idealistic, improbable) |
| silly(impractical, unlikely, unreal, idealistic, improbable) |
| starry-eyed(silly, impractical, unlikely, unreal, idealistic) |
| theoretical(silly, impractical, unlikely, idealistic, improbable) |
| unlikely(idealistic, improbable) |
| unreal(silly, unlikely, idealistic, improbable) |