7
indiscriminate(adjective, indifferent, casual, insensitive, ignorant)
7
madcap(adjective, rashness, feckless, unaccountable, irresponsive)
7
not good
7
unthoughtful(adjective, cold, forget, uncaring, inattentive)
7
weak(adjective, feature, state, trait, feeble)
6
apathetic(noun, adjective, calm, dull, hard)
6
blithe(adjective, feature, state, happy, relaxed)
6
delinquent(adjective, soft, indifferent, coarse, tolerant)
6
derelict(adjective, soft, indifferent, tolerant, slack)
6
distracted(noun, adjective, indifferent, anxious, worried)
6
harum-scarum(adjective, feature, state, trait, reckless)
6
ill-considered(adjective, foolish, stupid, thoughtless, reckless)
6
imprecise(adjective, wrong, soft, false, common)
6
indolent(adjective, dull, indifferent, casual, apathetic)
6
lighthearted(adjective, feature, state, happy, relaxed)
6
lightweight
6
mad(adjective, passionate, violent, thoughtless, abrupt)
6
permissive(adjective, feature, state, soft, trait)
6
precipitate(adjective, passionate, violent, wild, anxious)
6
shoddy(adjective, sloppy, slapdash, neglectful)
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APASmart Define. (2016). careless thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/careless/thesaurus/synonyms
ChicagoSmart Define. 2016. "careless thesaurus" https://smartdefine.org/careless/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, careless thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/careless/thesaurus/synonyms>.
MLASmart Define. "careless thesaurus" 3 March 2016. Web. 23 September 2026. <https://smartdefine.org/careless/thesaurus/synonyms>