12
inaccurate(adjective, soft, common, casual, tolerant)
12
injudicious(adjective, sharp, rough, indifferent, foolish)
12
insouciant(adjective, feature, state, calm, dull)
12
loose(adjective, calm, cool, relaxed, wild)
12
mindless(adjective, indifferent, wild, stupid, careful)
12
slapdash(adjective, dirty, careful, casual, quick)
11
absent-minded(noun, adjective, cold, foolish, stupid)
11
carefree(adjective, feature, state, weak, relaxed)
11
easygoing(adjective, feature, state, calm, dull)
11
feckless(adjective, feature, state, indifferent, wild)
11
improvident(adjective, foolish, casual, bold, extravagant)
11
inexact(adjective, wrong, soft, false, cold)
11
offhand(adjective, calm, cool, passionate, violent)
11
worry-free(adjective, feature, state, trait)
10
incurious(adjective, calm, cool, relaxed, cold)
10
oblivious(noun, adjective, soft, indifferent, silly)
9
disregardful(adjective, soft, casual, thoughtless, unconcerned)
9
distrait(noun, adjective, cold, forget, remote)
9
lazy(adjective, indifferent, idle, apathetic, sluggish)
9
messy(adjective, dirty, careful, slovenly, cluttered)
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APASmart Define. (2016). careless thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/careless/thesaurus/synonyms
ChicagoSmart Define. 2016. "careless thesaurus" https://smartdefine.org/careless/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, careless thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/careless/thesaurus/synonyms>.
MLASmart Define. "careless thesaurus" 3 March 2016. Web. 22 September 2026. <https://smartdefine.org/careless/thesaurus/synonyms>