| haphazardness(noun, neglect) |
| hastiness |
| hiatus(noun, slip, breach, lapse, failing) |
| ignoring(noun, slip, breach, lapse, failing) |
| incuriosity(noun, inattention) |
| insouciance |
| lack(noun, slip, breach, lapse, failing) |
| lack of foresight(expression, idiom) |
| lacuna(noun, slip, breach, lapse, failing) |
| lapse of memory(noun, expression, idiom, vagueness, amnesia) |
| laxness(noun, disregard, neglect, failure, carelessness) |
| leaving out(noun, expression, slip, breach, lapse) |
| memory loss(expression, idiom) |
| mental blankness(noun, expression, disregard, insensibility, unconsciousness) |
| missing(noun, slip, breach, lapse, failing) |
| noninclusion(noun, slip, breach, lapse, failing) |
| offhandedness |
| overlook(noun, slip, breach, lapse, failing) |
| overlooking(noun, slip, breach, lapse, failing) |
| passing over(noun, expression, slip, breach, lapse) |