| indelicacy(noun, rudeness, indiscretion, thoughtlessness, impropriety) |
| indiscreetness(noun, mistake, rudeness, lapse, error) |
| inelegance(slip, mistake, rudeness, impropriety, indecency) |
| ingenuousness(noun, mistake, rudeness, lapse, error) |
| inhibition(noun, difficulty, confusion, shame, mess) |
| lapse in judgement(noun, mistake) |
| lapsus linguae |
| lead balloon(noun, expression, decline, ruin, defeat) |
| lemon(noun, decline, ruin, defeat, blow) |
| loser(noun, decline, ruin, defeat, collapse) |
| loss(noun, decline, ruin, defeat, neglect) |
| lumber |
| lurch |
| mar |
| mess-up(noun, failure, mistake, error, indiscretion) |
| misapplication(noun, confusion, fault, mistake, lapse) |
| misapprehension(noun, slip, confusion, failure, fault) |
| misbelief(slip, failure, fault, mistake, lapse) |
| miscarriage(noun, decline, ruin, defeat, slight) |
| mischance(noun, ruin, defeat, blow, slip) |