9
unguarded(adjective, casual, thoughtless, impulsive, rash)
9
unheedful(adjective, cold, forget, rash, uncaring)
8
artless(adjective, natural)
8
bold(adjective, violent, anxious, cheerful, worried)
8
brash(adjective, sharp, rough, wild, foolish)
8
desperate(adjective, wild, anxious, worried, thoughtless)
8
hotheaded(adjective, wild, bold, thoughtless, impulsive)
8
inobservant(adjective, cold, forget, uncaring, distracted)
8
jaunty(adjective, feature, state, happy, relaxed)
8
lackadaisical(adjective, calm, dull, cool, relaxed)
8
listless(adjective, calm, cool, energy, relaxed)
8
relaxed(adjective, feature, state, calm, cool)
8
untidy(adjective, dirty, careful, disorderly)
7
adventurous(adjective, wild, thoughtless, impulsive, reckless)
7
audacious(adjective, wild, anxious, worried, thoughtless)
7
breakneck(adjective, wild, quick, thoughtless, rash)
7
capricious(adjective, easy, foolish, thoughtless, impulsive)
7
daredevil(adjective, wild, thoughtless, rash, irresponsible)
7
detached(noun, adjective, calm, cool, relaxed)
7
easy(adjective, feature, state, calm, cool)
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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>