13
unheedful(adjective, careless, cold, indifferent, forget)
12
absent-minded(noun, adjective, careless, cold, casual)
12
derelict(adjective, adverb, soft, careless, indifferent)
11
disregardful(adjective, soft, sharp, rude, careless)
11
regardless(adjective, soft, careless, cold, indifferent)
11
slovenly(adjective, careless, indifferent, loose, sloppy)
10
disinterested(adjective, calm, cool, relaxed, cold)
10
distracted(noun, adjective, careless, indifferent, apathetic)
10
imprudent(adjective, easy, careless, wild, foolish)
10
incurious(adjective, calm, cool, careless, relaxed)
10
irresponsible(adjective, feature, state, careless, indifferent)
10
rash(adjective, easy, sharp, rude, careless)
10
slapdash(adjective, careless, indifferent, loose, casual)
10
unheeding(adjective, sharp, rude, careless, cold)
10
unobservant(noun, adjective, careless, cold, casual)
10
unthinking(adjective, sharp, rude, careless, indifferent)
10
unwary(adjective, cold, forget, thoughtless, uncaring)
10
unwatchful(adjective, adverb, careless, cold, forget)
9
casual(adjective, feature, state, calm, cool)
8
dilatory(adjective, slow, careless, sluggish, lazy)
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APASmart Define. (2015). negligent thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/negligent/thesaurus/synonyms
ChicagoSmart Define. 2015. "negligent thesaurus" https://smartdefine.org/negligent/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, negligent thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/negligent/thesaurus/synonyms>.
MLASmart Define. "negligent thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/negligent/thesaurus/synonyms>