122 entries under casual topic. ×

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abrupt
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absent-minded(happy-go-lucky, slapdash)
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abstracted(happy-go-lucky, slapdash)
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brusque
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coolheaded(adjective, calm, quiet, relaxed)
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curt
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deliberate(adjective, calm, quiet, slow, relaxed)
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equable(adjective, calm, unruffled)
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folksy(cool, relaxed, indifferent, easygoing)
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hasty(happy-go-lucky, slapdash)
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inaccurate(happy-go-lucky, slapdash)
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incautious(happy-go-lucky, slapdash)
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indiscreet(happy-go-lucky, slapdash)
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injudicious(happy-go-lucky, slapdash)
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napping(happy-go-lucky, slapdash)
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philosophical(adjective, calm, quiet, relaxed)
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unagitated(adjective, calm, quiet, relaxed)
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uncircumspect(happy-go-lucky, slapdash)
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unguarded(happy-go-lucky, slapdash)
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unobservant(happy-go-lucky, slapdash)
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APASmart Define. (2015). nonchalant thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/nonchalant/thesaurus/synonyms
ChicagoSmart Define. 2015. "nonchalant thesaurus" https://smartdefine.org/nonchalant/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, nonchalant thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/nonchalant/thesaurus/synonyms>.
MLASmart Define. "nonchalant thesaurus" 9 December 2015. Web. 30 September 2026. <https://smartdefine.org/nonchalant/thesaurus/synonyms>