4
wanton(adjective, wild, extravagant, lavish, reckless)
4
wasteful(adjective, casual, extravagant, incompetent, lavish)
3
absent(adjective, indifferent, apathetic, unconcerned, remote)
3
bad(adjective, quality)
3
bedraggled
3
breezy(adjective, feature, state, happy, relaxed)
3
broad(soft, tolerant, slack, lenient, remiss)
3
bumbling(adjective, neglectful)
3
buoyant(adjective, feature, state, happy, relaxed)
3
calm(adjective, feature, state, cool, happy)
3
cavalier(adjective, indifferent, casual, extravagant, easygoing)
3
cheerful(adjective, feature, state, happy, relaxed)
3
cheery(adjective, feature, state, happy, relaxed)
3
daydreaming(adjective, indifferent, silly, foolish, apathetic)
3
devil May care(expression, idiom)
3
disorderly(adjective, casual, sloppy, untidy, messy)
3
disorganized(adjective, casual, incompetent, disordered, untidy)
3
dreamy(adjective, indifferent, apathetic, unconcerned, remote)
3
fallible(adjective, able, prone)
3
fanciful(adjective, unstable, unreasonable, changeable, variable)
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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>