12
careless(adjective, unconcerned, attentive, responsible)
5
half ass
5
work-shy
3
neglectful
3
negligent
3
thoughtless
3
unorganized
2
non-punctual
2
casual(adjective, deliberate, chance, random)
2
heedless
2
lax
2
lazy
2
unmindful
1
easy
1
apathetic
1
bold
1
carefree
1
cursory(adjective, casual, hasty)
1
dilatory
1
easygoing
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APASmart Define. (2016). painstaking thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/painstaking/thesaurus/antonyms
ChicagoSmart Define. 2016. "painstaking thesaurus" https://smartdefine.org/painstaking/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, painstaking thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/painstaking/thesaurus/antonyms>.
MLASmart Define. "painstaking thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/painstaking/thesaurus/antonyms>