| untenable(adjective, quality, weakness, instability, unfounded) |
| indefensible(adjective, quality, weakness, invalid, instability) |
| unjustifiable(adjective, quality, weakness, instability, defended) |
| unverifiable(adjective, quality, weakness, true, real) |
| groundless(adjective, quality, weakness, instability, defended) |
| unmaintainable(adjective, quality, weakness, instability) |
| insupportable(adjective, support, quality, weakness, true) |
| implausible(adjective, quality, weakness, instability) |
| unmanageable(adjective, quality, weakness, instability) |
| unsanctionable(adjective, quality, weakness, instability) |
| fleeting(adjective, quality, weakness, instability) |
| temporary(adjective, quality, weakness, instability) |
| unendurable(adjective, quality, weakness, instability) |
| unfeasible(adjective, quality, weakness, instability) |
| unsuitable(adjective, quality, weakness, instability) |
| unviable(adjective, quality, weakness, instability) |
| unworkable(adjective, quality, weakness, instability) |
| unfounded(adjective, quality, weakness, instability, defended) |
| brief(adjective, quality, weakness, instability) |
| unsound(adjective, quality, weakness, instability, defended) |