105 entries under casual topic. ×

2
happy-go-lucky(adjective, informal, careless, unconcerned)
2
irresponsible(adjective, happy-go-lucky, slapdash)
2
loose(adjective, calm, cool, relaxed, indifferent)
2
mindless(happy-go-lucky, slapdash)
2
placid(adjective, calm, cool, relaxed)
2
reckless(careless, easygoing, happy-go-lucky, slapdash)
2
regardless(slow, careless, indifferent, thoughtless)
2
remote(adjective, cool, relaxed, detached)
2
slapdash(adjective, slow, careless, indifferent)
2
slipshod(adjective, slow, indifferent, thoughtless)
2
sloppy(slow, careless, indifferent, negligent)
2
thoughtless(adjective, slow, careless, indifferent)
2
unmindful(careless, negligent, lax, happy-go-lucky)
2
untroubled(adjective, calm, cool, relaxed, indifferent)
1
abstracted(adjective, careless, indifferent, lethargic)
1
forgetful(adjective, slow, careless, indifferent)
1
imperturbable(adjective, calm, cool, relaxed)
1
improvident(happy-go-lucky, slapdash)
1
laid back(expression, adjective, calm, cool, informal)
1
mellow(adjective, calm, cool, relaxed, detached)
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APASmart Define. (2016). lackadaisical thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/lackadaisical/thesaurus/synonyms
ChicagoSmart Define. 2016. "lackadaisical thesaurus" https://smartdefine.org/lackadaisical/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, lackadaisical thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/lackadaisical/thesaurus/synonyms>.
MLASmart Define. "lackadaisical thesaurus" 2 March 2016. Web. 30 September 2026. <https://smartdefine.org/lackadaisical/thesaurus/synonyms>