| fly-by-night(adjective, light, weak, slight, short) |
| gimcrack(adjective, weakness) |
| idle(adjective, light, weak, slight, trivial) |
| illusional(adjective, strange, fantasy, unreal) |
| illusionary(adjective, strange, fantasy, unreal) |
| inconsiderable(adjective, weak, slight, poor, low) |
| ineffective(adjective, dull, light, soft, poor) |
| ineffectual(adjective, dull, light, weak, soft) |
| jerry-built(adjective, flimsy) |
| lame(adjective, weak, flat, poor, thin) |
| minor(adjective, small, unimportant) |
| nebulous(fake, false, imaginary, fanciful, illusory) |
| nominal |
| otherworldly(adjective, strange, fantasy, unreal) |
| pale(adjective, dull, light, soft, poor) |
| phantom |
| scant(adjective, mean, slight, flat, poor) |
| shallow(adjective, weak, slight, thin, feeble) |
| spectral(adjective, dull, light, soft, poor) |
| unbodied(adjective, body, immaterial) |