| foolishness(noun, weakness, mistake, thoughtlessness, nonsense) |
| impracticability(noun, awkwardness, hopelessness, uselessness, futility) |
| folly(noun, idea, nonsense, absurdity, stupidity) |
| madness(nonsense, absurdity, stupidity, foolishness, silliness) |
| idealism |
| impossibility(noun, awkwardness, hopelessness, uselessness, inefficiency) |
| unworkability(noun, awkwardness, hopelessness, uselessness, inefficiency) |
| uselessness(noun, awkwardness, absurdity, inutility, ridiculousness) |
| futility(noun, absurdity, hopelessness, inutility, ridiculousness) |
| ideality |
| craziness(noun, weakness, thoughtlessness, nonsense, absurdity) |
| failure(noun, hopelessness, inutility, futility, unfeasibility) |
| hopelessness(noun, awkwardness, uselessness, futility, unfeasibility) |
| illogicality(noun, foolishness, inconsistency, irrationality, unreason) |
| imbecility(noun, nonsense, absurdity, stupidity, foolishness) |
| inadequacy(noun, inutility, uselessness, unusableness) |
| inoperability |
| insanity(noun, weakness, mistake, thoughtlessness, nonsense) |
| irrationality(noun, thoughtlessness, nonsense, absurdity, stupidity) |
| lunacy(nonsense, absurdity, stupidity, foolishness, madness) |