4
disheveled(adjective, slovenly)
4
distant(adjective, indifferent, nonchalant, undisturbed, undaunted)
4
easy-going(adjective, feature, state, happy, relaxed)
4
erroneous(adjective, wrong, rough, poor, false)
4
fickle(adjective, loose, foolish, unstable, unreasonable)
4
flighty(adjective, foolish, stupid, unstable, unreasonable)
4
furious(anxious, worried, thoughtless, impulsive, reckless)
4
happy-go-lucky(adjective, feature, state, happy, relaxed)
4
hurried(casual, quick, speedy, hasty, superficial)
4
ill-advised(adjective, wild, foolish, stupid, quick)
4
impolitic(adjective, foolish, thoughtless, inappropriate, rash)
4
incorrect(adjective, wrong, rough, poor, false)
4
inefficient(adjective, well, extravagant, incompetent, lavish)
4
promiscuous(adjective, easy, wild, loose, immoral)
4
tactless(adjective, thoughtless, inappropriate, unkind, insensitive)
4
unaware(adjective, indifferent, silly, foolish, unconcerned)
4
unconscious(adjective, indifferent, casual, apathetic, thoughtless)
4
undiscerning(adjective, indifferent, foolish, stupid, casual)
4
uninquisitive(adjective, incurious)
4
volatile(adjective, unstable, unreasonable, unpredictable, changeable)
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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>