1. carelessness(n = noun.attribute) sloppiness - the quality of not being careful or taking pains;
is a kind of inattentiveness
has particulars: incaution, incautiousness, neglect, neglectfulness, negligence, unconscientiousness
Antonym: carefulness
Derived forms adjective careless1, adjective careless3
2. carelessness(n = noun.act) neglect, negligence, nonperformance - failure to act with the prudence that a reasonable person would exercise under the same circumstances;
is a kind of nonaccomplishment, nonachievement
has particulars: dereliction, comparative negligence, concurrent negligence, contributory negligence, criminal negligence, culpable negligence, neglect of duty, dodging, escape, evasion
Derived form adjective careless1
The quality or state of being careless; heedlessness; negligence; inattention. [1913 Webster]
N rashness, temerity, want of caution, imprudence, indiscretion, overconfidence, presumption, audacity, precipitancy, precipitation, impetuosity, levity, foolhardihood, foolhardiness, heedlessness, thoughtlessness, carelessness, desperation, Quixotism, knight-errantry, fire eating, gaming, gambling, blind bargain, leap in the dark, leap of faith, fool's paradise, too many eggs in one basket, desperado, rashling, madcap, daredevil, Hotspur, fire eater, bully, bravo, Hector, scapegrace, enfant perdu, Don Quixote, knight-errant, Icarus, adventurer, gambler, gamester, dynamitard, boomer, rash, incautious, indiscreet, imprudent, improvident, temerarious, uncalculating, heedless, careless, without ballast, heels over head, head over heels, giddy, wanton, reckless, wild, madcap, desperate, devil-may-care, hot-blooded, hotheaded, hotbrained, headlong, headstrong, breakneck, foolhardy, harebrained, precipitate, impulsive, overconfident, overweening, venturesome, venturous, adventurous, Quixotic, fire eating, cavalier, janty, jaunty, free and easy, off one's guard, post haste, a corps perdu, hand over head, tete baissee, headforemost, happen what may, come what may, neck or nothing, the devil being in one, non semper temeritas est felix, paucis temeritas est bono multis malo.
N neglect, carelessness, trifling, negligence, omission, oversight, laches, default, supineness, inattention, nonchalance, imprudence, recklessness, slovenliness improvidence, noncompletion, inexactness, paralipsis, paralepsis, paraleipsis (in rhetoric), trifler, waiter on Providence, Micawber, neglecting, unmindful, negligent, neglectful, heedless, careless, thoughtless, perfunctory, remiss, feebleness, inconsiderate, uncircumspect, incircumspect, off one's guard, unwary, unwatchful, unguarded, offhand, supine, inattentive, insouciant, imprudent, reckless, slovenly inexact, improvident, neglected, unheeded, uncared-for, unperceived, unseen, unobserved, unnoticed, unnoted, unmarked, unattended to, unthought of, unregarded, unremarked, unmissed, shunted, shelved, unexamined, unstudied, unsearched, unscanned, unweighed, unsifted, unexplored, abandoned, buried in a napkin, hid under a bushel, negligently, hand over head, anyhow, in an unguarded moment, per incuriam, Int, never mind, no matter, let it pass, out of sight, out of mind.