3
harum-scarum(adjective, feature, state, violent, careless)
3
hectic(adjective, reckless)
3
ignoring(adjective, inattentive)
3
ill-judged(adjective, careless, foolish, bold, thoughtless)
3
impolitic(adjective, rude, careless, foolish, thoughtless)
3
in the clouds(noun, adjective)
3
incogitant(adjective, cold, forget, uncaring, inattentive)
3
inexact(adjective, cold, forget, uncaring, inattentive)
3
irrational(adjective, careless, wild, bold, thoughtless)
3
lighthearted(adjective, feature, state, trait, cheerful)
3
loose(adjective, careless, indifferent, dirty, casual)
3
lost(adjective, careless, indifferent, apathetic, remote)
3
off
3
overconfident(adjective, sure)
3
promiscuous(adjective, easy)
3
rude(adjective, sharp, careless, indifferent, coarse)
3
shortsighted
3
slipshod(adjective, careless, indifferent, casual, thoughtless)
3
slovenly(adjective, careless, indifferent, sloppy, inattentive)
3
unattending(adjective, cold, forget, uncaring, inattentive)
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APASmart Define. (2016). heedless thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/heedless/thesaurus/synonyms
ChicagoSmart Define. 2016. "heedless thesaurus" https://smartdefine.org/heedless/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, heedless thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/heedless/thesaurus/synonyms>.
MLASmart Define. "heedless thesaurus" 24 March 2016. Web. 21 September 2026. <https://smartdefine.org/heedless/thesaurus/synonyms>