| unbelievable(adjective, strange, fantasy, imaginary, unreal) |
| apparent(adjective, illusive) |
| artificial(adjective, fake, false, imaginary, fanciful) |
| bizarre(adjective, strange, fantasy, unreal) |
| dubious(adjective, unpredictable, fickle, variable, undependable) |
| febrile(adjective, feverish) |
| immaterial(fake, false, negative, imaginary, fanciful) |
| impalpable(fake, false, imaginary, fanciful, illusory) |
| incredible(adjective, strange, amazing, fantasy, astonishing) |
| intangible(fake, false, imaginary, fanciful, illusory) |
| mind-expanding |
| notional(adjective, fake, false, fantastic, imaginary) |
| ostensible(adjective, fake, false, fantastic, deceitful) |
| phantasm(adjective, fantastic, fanciful, illusive) |
| phantasmic(adjective, real, illusive) |
| questionable(adjective, unpredictable, fickle, variable, undependable) |
| shadowy |
| spiritual(adjective, psychical) |
| tricky(adjective, unpredictable, fickle, variable, undependable) |
| unreliable(adjective, true, unpredictable, fickle, variable) |