3
precipitation(drive, dash, assurance, nerve, daring)
3
slight(noun, disregard, neglect, disrespect, disdain)
3
unconsciousness(noun, inattention)
3
unresponsiveness(noun, disregard, apathy, indifference, calmness)
2
absence(noun, inattention)
2
absent-mindedness(noun, carelessness, vagueness, inattention, daydreaming)
2
absentmindedness(blank, carelessness, vagueness, inattention, amnesia)
2
assurance(noun, nerve, daring, gall, carelessness)
2
befuddlement(noun, inattention)
2
boredom(noun, indifference, lethargy, unconcern)
2
contempt(noun, neglect, disrespect, disdain, resistance)
2
default(noun, disregard, negligence, inattention, abandonment)
2
disdain(noun, disregard, neglect, interest, lack)
2
disesteem(noun, neglect, disrespect, disdain, apathy)
2
dreaminess(noun, blank, carelessness, vagueness, inattention)
2
impassivity(noun, disregard, interest, lack, dullness)
2
impetuosity(noun, drive, press, rush, dash)
2
impetuousness(noun, resistance, thoughtlessness, recklessness, stupidity)
2
inactivity(noun, disregard, dullness, apathy, indifference)
2
incaution
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APASmart Define. (2016). heedlessness thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/heedlessness/thesaurus/synonyms
ChicagoSmart Define. 2016. "heedlessness thesaurus" https://smartdefine.org/heedlessness/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, heedlessness thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/heedlessness/thesaurus/synonyms>.
MLASmart Define. "heedlessness thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/heedlessness/thesaurus/synonyms>