4
offhand(adjective, calm, cool, relaxed, detached)
4
somnolent(adjective, dull, careless, relaxed, indifferent)
4
stolid(adjective, dull, weary, apathetic, tired)
4
tired(adjective, dull, slow, careless, indifferent)
4
unexcited(adjective, calm, cool, relaxed, indifferent)
4
unhurried(adjective, dull, quiet, weak, easy)
4
unimpressed(adjective, indifferent, apathetic)
4
work-shy(adjective, idle, lazy, indolent, faineant)
3
blase(calm, cool, informal, relaxed, indifferent)
3
callous(adjective, indifferent, unsympathetic, inattentive, uninterested)
3
cold-blooded(adjective, temper, cold, negative, behave)
3
detached(adjective, calm, cool, relaxed, indifferent)
3
faineant(adjective, careless, indifferent)
3
heavy(adjective, dull, quiet, weak, easy)
3
hebetudinous(adjective, lethargic)
3
impersonal(adjective, temper, cold, negative, detached)
3
inconsiderate(adjective, casual, happy-go-lucky, slapdash)
3
relaxed(adjective, calm, cool, slow, careless)
3
romantic(adjective, careless, indifferent)
3
sentimental(adjective, careless, indifferent)
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APASmart Define. (2016). lackadaisical thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/lackadaisical/thesaurus/synonyms
ChicagoSmart Define. 2016. "lackadaisical thesaurus" https://smartdefine.org/lackadaisical/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, lackadaisical thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/lackadaisical/thesaurus/synonyms>.
MLASmart Define. "lackadaisical thesaurus" 2 March 2016. Web. 27 September 2026. <https://smartdefine.org/lackadaisical/thesaurus/synonyms>