210 entries under casual topic. ×

8
inconsiderate(adjective, person, neglect, careless, indifferent)
8
nonchalant(adjective, calm, cool, mild, careless)
8
uninterested(adjective, cool, careless, indifferent, restrained)
8
unplanned(noun, adjective, free, simple, fake)
7
easygoing(adjective, calm, cool, careless, relaxed)
7
impulsive(noun, adjective, adverb, simple, careless)
7
short(adjective, rough, rude, angry)
7
unthinking(adjective, careless, indifferent, thoughtless)
6
aloof(adjective, calm, cool, careless, relaxed)
6
flippant(adjective, frivolous, glib, irreverent)
6
glib(adjective, careless, indifferent, nonchalant)
6
impetuous(noun, adjective, simple, passionate, violent)
6
insouciant(adjective, calm, cool, mild, relaxed)
6
reckless(noun, adjective, careless, thoughtless)
6
relaxed(adjective, calm, cool, mild, cheerful)
6
slapdash(adjective, careless, indifferent, unconcerned)
6
superficial(adjective, rude, unreasonable, unthinking)
5
heedless(adjective, careless, indifferent, thoughtless)
5
mindless(inattention, happy-go-lucky, slapdash)
5
natural(adjective, calm, simple, easy)
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APASmart Define. (2016). offhand thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/offhand/thesaurus/synonyms
ChicagoSmart Define. 2016. "offhand thesaurus" https://smartdefine.org/offhand/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, offhand thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/offhand/thesaurus/synonyms>.
MLASmart Define. "offhand thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/offhand/thesaurus/synonyms>