| insubstantial(adjective, dull, body, strong, light) |
| flimsy(adjective, strong, light, weak, great) |
| weak(adjective, dull, strong, light, great) |
| unreal(adjective, gentle, fake, substance, trivial) |
| fragile(adjective, strong, light, weak, slight) |
| frail(adjective, strong, light, weak, slight) |
| thin(adjective, dull, light, weak, great) |
| feeble(adjective, dull, strong, light, weak) |
| imaginary(adjective, light, gentle, substance, strange) |
| immaterial(adjective, form, body, light, weak) |
| lightweight(adjective, light, slight, easy, thin) |
| slight(adjective, light, weak, soft, easy) |
| unbelievable(adjective, extraordinary, strange, unreasonable, fantasy) |
| light(adjective, weak, soft, slight, thin) |
| ethereal(adjective, light, slight, easy, thin) |
| vaporous(adjective, negative, frail, unreal, vacant) |
| visionary(adjective, gentle, obscure, substance, strange) |
| fantastic(adjective, gentle, extraordinary, strange, fantasy) |
| intangible(adjective, gentle, abstract, heavenly, indefinite) |
| shaky(adjective, weak, slight, thin, delicate) |