Englishcarelessness
noun
the fire was caused through the carelessness of one of the workmen:
inattention, inattentiveness, heedlessness, thoughtlessness, negligence, improvidence, remissness;
forgetfulness, absentmindedness;
irresponsibility, impetuosity, recklessness, rashness;
laxity, laxness, slackness;
clumsiness, ineptitude;
oversight, omission, dereliction;
informal sloppiness.
▷antonyms carefulness.