45
careless(noun, adjective, feature, state, calm)
33
neglectful(noun, adjective, calm, cool, soft)
33
remiss(noun, adjective, soft, neglect, slow)
30
inattentive(noun, adjective, sharp, rude, careless)
28
heedless(noun, adjective, feature, state, easy)
27
thoughtless(adjective, feature, state, easy, sharp)
25
unmindful(noun, adjective, soft, easy, sharp)
21
forgetful(adjective, soft, careless, cold, indifferent)
20
inadvertent(adjective, careless, cold, indifferent, casual)
20
lax(adjective, feature, state, soft, slow)
18
perfunctory(adjective, neglect, cold, forget, dead)
18
reckless(adjective, feature, state, easy, sharp)
17
indifferent(noun, adjective, feature, state, calm)
16
nonchalant(adjective, feature, state, calm, cool)
16
slipshod(adjective, soft, careless, indifferent, casual)
15
inconsiderate(adjective, sharp, rude, careless, cold)
15
unconcerned(noun, adjective, feature, state, calm)
14
delinquent(adjective, soft, careless, indifferent, tolerant)
14
sloppy(adjective, soft, informal, careless, indifferent)
13
slack(noun, adjective, quiet, soft, slow)
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APASmart Define. (2015). negligent thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/negligent/thesaurus/synonyms
ChicagoSmart Define. 2015. "negligent thesaurus" https://smartdefine.org/negligent/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, negligent thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/negligent/thesaurus/synonyms>.
MLASmart Define. "negligent thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/negligent/thesaurus/synonyms>