Another word for careless
loose, lax, remiss, unguarded, incautious, forgetful, unthinking, unobservant, uncircumspect, reckless, unheeding, indiscreet, injudicious, inadvertent, unconcerned, improvident, wasteful, regardless, imprudent, unconsidered, unwary, cursory, hasty, inconsiderate, irresponsible, indolent, insouciant, lackadaisical, heedless, mindless, negligent, neglectful, sloppy, slapdash, inaccurate, imprecise, inexact, slipshod, slovenly, thoughtless, unmindful, indifferent, casual, disregardful, oblivious, absent-minded, listless, abstracted, nonchalant, undiscerning, offhand, slack, blundering; see also rash, unconcerned.
Another word for carelessadjective
Lacking or marked by a lack of care:feckless, heedless, inattentive, irresponsible, reckless, thoughtless, unconcerned, unmindful, unthinking. See careful
Indifferent to correctness, accuracy, or neatness:messy, slapdash, slipshod, sloppy, slovenly, untidy. See careful
Showing no concern, attention, or regard:forgetful, heedless, mindless, unconcerned, unheeding, unmindful, unobservant, unthinking. See careful