| incredible(adjective, extraordinary, strange, unreasonable, fantasy) |
| spectral(adjective, dull, light, soft, poor) |
| spiritual(adjective, body, abstract, heavenly, theoretical) |
| trivial(adjective, light, weak, soft, slight) |
| unconvincing(adjective, thin, extraordinary, strange, unreasonable) |
| unstable(adjective, weak, delicate, false, ill) |
| unsteady(adjective, false, uncertain, unstable, ill) |
| ephemeral(light, weak, slight, frail, imaginary) |
| insecure(adjective, weak, delicate, false, unstable) |
| jerry-built(adjective, flimsy) |
| metaphysical(adjective, body, light, weak, slight) |
| nonmaterial(adjective, abstract, heavenly, theoretical, abstruse) |
| nonphysical(adjective, body, abstract, heavenly, theoretical) |
| paltry(adjective, weak, small, insignificant, unimportant) |
| poor(adjective, dull, light, weak, soft) |
| trifling(adjective, light, weak, soft, slight) |
| aerial(adjective, light, weak, slight, substance) |
| breakable(adjective, weak, delicate, feeble, infirm) |
| delusional(adjective, strange, fantasy, unreal) |
| delusory(adjective, strange, fantasy, unreal) |