70 entries under heedless topic. ×

3
deaf(adjective, sharp, rude, indifferent, short)
2
blind(adjective, sharp, rude, careless, indifferent)
2
caught napping(expression, careless, bold, thoughtless, impulsive)
2
hasty(adjective, sharp, rude, careless, indifferent)
2
ill-advised(adjective, careless, wild, bold, thoughtless)
2
impulsive(adjective, careless, bold, thoughtless, inappropriate)
2
indiscreet(adjective, sharp, rude, careless, indifferent)
2
injudicious(adjective, careless, casual, bold, thoughtless)
2
madcap(adjective, careless, wild, bold, thoughtless)
2
off guard(expression, adjective, adverb, careless, bold)
2
out of it(expression, adjective, idiom, careless, silly)
2
out to lunch(expression, adjective, idiom, careless, unconcerned)
2
uncircumspect(careless, casual, thoughtless, happy-go-lucky)
2
uninformed(adjective, unconcerned, ignorant, naive, unconscious)
2
unknowing(adjective, unconcerned, ignorant, naive, unconscious)
2
unvigilant(adjective, careless, bold, thoughtless, impulsive)
2
unwitting(adjective, careless, unconcerned, sloppy, slack)
1
any old way(expression, idiom, careless, bold, thoughtless)
1
bold(careless, thoughtless, rash, wary, reckless)
1
daydreaming(adjective, slow, careless, silly, foolish)
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APASmart Define. (2015). negligent thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/negligent/thesaurus/synonyms
ChicagoSmart Define. 2015. "negligent thesaurus" https://smartdefine.org/negligent/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, negligent thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/negligent/thesaurus/synonyms>.
MLASmart Define. "negligent thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/negligent/thesaurus/synonyms>