| nebulous(adjective, fake, false, imaginary, fanciful) |
| nonexistent(adjective, fake, false, imaginary, fanciful) |
| nonrealistic(adjective, silly, impractical, unlikely, unreal) |
| not likely(expression, adjective, unreasonable, dubious, unlikely) |
| not sensible(expression, adjective, silly, impractical, unlikely) |
| notional(adjective, fake, false, imaginary, fanciful) |
| obscure(adjective, unreasonable, dubious, unlikely, flimsy) |
| on cloud nine(expression, adjective, idiom, silly, unlikely) |
| ostensible(adjective, fake, false, imaginary, fanciful) |
| out of this world(expression, idiom, imaginary, illusory, dreamlike) |
| phantasmagoric(adjective, fake, false, imaginary, fanciful) |
| pretended(adjective, fake, false, imaginary, fanciful) |
| problematic(adjective, unreasonable, dubious, unlikely, flimsy) |
| puzzling(adjective, unreasonable, dubious, unlikely, flimsy) |
| questionable(unlikely, unbelievable, improbable) |
| quixotic(adjective, silly, impractical, unlikely, unreal) |
| seeming(adjective, fake, false, imaginary, fanciful) |
| shaky |
| sham(adjective, fake, false, imaginary, fanciful) |
| silly(adjective, impractical, unlikely, unreal, idealistic) |