140 entries under casual topic. ×

6
removed(adjective, careless, detached, aloof)
6
unthinking(adjective, sharp, rude, careless, short)
5
happy-go-lucky(adjective, feature, state, trait)
5
inadvertent(adjective, careless, apathetic, sloppy)
5
serene(adjective, feature, state, calm, cool)
5
unexcited(adjective, calm, cool, relaxed, restrained)
5
unheeding(adjective, sharp, rude, careless, short)
5
untroubled(adjective, feature, state, calm, cool)
4
airy(adjective, feature, state, calm, cool)
4
breezy(adjective, feature, state, cool, relaxed)
4
collected(adjective, calm, cool, relaxed, cold)
4
light(adjective, feature, state, calm, cool)
4
slipshod(adjective, soft, slow, careless)
4
sloppy(adjective, soft, careless, thoughtless)
4
unflappable(adjective, calm, quiet, cool, relaxed)
3
trifling(adjective, calm, dull, cool, reasonable)
3
uncommitted(adjective, cool, detached, aloof)
3
unobservant(noun, adjective, careless, apathetic)
3
unruffled(adjective, calm, cool, relaxed, restrained)
3
abstracted(noun, adjective, dull, careless, relaxed)
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APASmart Define. (2016). indifferent thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/indifferent/thesaurus/synonyms
ChicagoSmart Define. 2016. "indifferent thesaurus" https://smartdefine.org/indifferent/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, indifferent thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/indifferent/thesaurus/synonyms>.
MLASmart Define. "indifferent thesaurus" 23 March 2016. Web. 29 September 2026. <https://smartdefine.org/indifferent/thesaurus/synonyms>