528 entries under adjective topic. ×

8
unguarded(careless, casual, bold, thoughtless)
8
uninterested(dull, indifferent, detached, distant)
7
adventurous(careless, wild, thoughtless, impulsive)
7
cursory(careless, indifferent, casual, quick)
7
feckless(feature, state, careless, indifferent)
7
happy-go-lucky(feature, state, careless, trait)
7
hotheaded(rude, careless, wild, silly)
7
ill-advised(rude, violent, careless, wild)
7
injudicious(careless, indifferent, foolish, casual)
7
listless(energy, sharp, rude, careless)
7
unwise(careless, foolish, thoughtless, rash)
6
apathetic(noun, dull, sharp, rude)
6
audacious(rude, careless, wild, thoughtless)
6
dispassionate(indifferent, detached, distant, apathetic)
6
faraway(careless, indifferent, apathetic, remote)
6
indiscriminate(indifferent, insensitive, ignorant, erratic)
6
sloppy(careless, indifferent, casual, thoughtless)
6
thankless(inconsiderate, unappreciative, ungrateful)
6
uninquisitive
6
unwatchful(careless, cold, forget, bold)
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APASmart Define. (2016). heedless thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/heedless/thesaurus/synonyms
ChicagoSmart Define. 2016. "heedless thesaurus" https://smartdefine.org/heedless/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, heedless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/heedless/thesaurus/synonyms>.
MLASmart Define. "heedless thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/heedless/thesaurus/synonyms>