70 entries under heedless topic. ×

1
deaf to(expression, adjective, unconcerned, ignorant, unconscious)
1
doped(adjective, unconcerned, ignorant, unconscious)
1
fast-and-loose(adjective, careless, bold, thoughtless, impulsive)
1
fast and loose(expression, idiom, careless, wild, thoughtless)
1
foot-in-mouth(adjective, careless, bold, thoughtless, impulsive)
1
hotheaded(adjective, careless, wild, bold, thoughtless)
1
ignorant(adjective, improper, unconcerned, incompetent, naive)
1
ill-judged(adjective, careless, bold, thoughtless, impulsive)
1
impetuous(careless, bold, thoughtless, rash, wary)
1
in a daze(expression, adjective, idiom, ignorant, unconscious)
1
incognizant(adjective, unconcerned, ignorant, unconscious)
1
inconversant(adjective, unconcerned, ignorant, unconscious)
1
mooning(adjective, careless, silly, foolish, senseless)
1
nescient(adjective, unconcerned, ignorant, unconscious)
1
not all there(expression, adjective, idiom, unconcerned, ignorant)
1
not careful(expression, adjective, careless, bold, thoughtless)
1
not cognizant(expression, adjective, unconcerned, ignorant, unconscious)
1
out cold(expression, adjective, unconcerned, ignorant, unconscious)
1
pay no mind(expression, idiom, careless, bold, thoughtless)
1
playing with fire(expression, idiom, careless, wild, bold)
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APASmart Define. (2015). negligent thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/negligent/thesaurus/synonyms
ChicagoSmart Define. 2015. "negligent thesaurus" https://smartdefine.org/negligent/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, negligent thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/negligent/thesaurus/synonyms>.
MLASmart Define. "negligent thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/negligent/thesaurus/synonyms>