Effortless, absent-minded, artless, and casual are all synonyms for careless. Careful, attentive, meticulous, and judicious are antonyms of careless. And here are 80 another word for careless.
Absent-minded, amateurish, couldn't care less, cursory, disorganized, erroneous, error-ridden, foolhardy, forgetful, frivolous about, hare-brained, hasty, heedless of, heedless, hit-or-miss, hurried, ill-advised, ill-considered, ill-thought-out, impetuous, imprecise, improvident about, inaccurate, inadvertent, inattentive, incautious, incorrect, indifferent to, indiscreet, inexact, insensitive, irresponsible, lax, mindless of, misguided, negligent in, negligent, oblivious to, perfunctory, rash, reckless about, reckless, remiss in, remiss, scatterbrained, scrappy, shoddy, sketchy, slack, slap-happy, slapdash about, slapdash, slipshod about, slipshod, sloppy in, sloppy, slovenly, spur-of-the-moment, thoughtless, thrown together, unconcerned about, unconsidered, unguarded, unthinking, unwise, wild, wrong, and messy in are all synonyms for careless.
Artless, casual, effortless, informal, insouciant, languid, leisurely, nonchalant, unconcerned, unstudied, and couldn't-care-less are all another word for careless.
Careless synonym page has a variety of synonyms that differ in length. 1 synonym with 3 letters and 2 synonyms with 4, 15, and 16 letters. 3 synonyms with 5, 12, and 14 letters and 5 synonyms with 6 letters.
7 synonyms with 7, and 13 letters and 8 synonyms with 8 letters. 13 synonyms with 9 letters and 11 synonyms with 10 letters. 10 synonyms with 11 letters. For a total of 77 another word for careless.
His careless mistakes cost him dearly.
She was careless with her belongings.
Careless driving can lead to accidents.
They made a careless decision yesterday.