| faint(adjective, unclear, indistinct, indistinguishable) |
| fairy-tale(adjective, happy, perfect, fantastic, extravagant) |
| fake(false, fantastic, imaginary, fanciful, illusory) |
| fallacious |
| fatuous |
| fictive(adjective, fake, happy, perfect, false) |
| figmental(fake, false, fantastic, unreal, fanciful) |
| flaky(adjective, happy, perfect, fantastic, extravagant) |
| floating(adjective, happy, perfect, fantastic, extravagant) |
| freakish(adjective, funny) |
| gaseous |
| ghostly(heavenly, incorporeal, nonmaterial) |
| gossamery |
| heavenly(incorporeal, nonmaterial) |
| high-flown(adjective, intellectual, abstract, unreal, unattainable) |
| hypothetical(adjective, negative, intellectual, abstract, unreal) |
| idealistic |
| imaginative(adjective, happy, perfect, fantastic, extravagant) |
| impalpable(fake, false, heavenly, unclear, indistinct) |
| imponderable(negative, heavenly, vacant, fictional, incorporeal) |