73 entries under nonchalant topic. ×

1
hard-hearted(adjective, calm, indifferent, restrained, unsympathetic)
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hardened(adjective, indifferent, unsympathetic, inattentive, uninterested)
1
heedless(adjective, dull, indifferent, unsympathetic, sluggish)
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incurious(adjective, calm, cool, relaxed, indifferent)
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knowing(adjective, cool, indifferent, sophisticated, apathetic)
1
laid back(expression, adjective, calm, cool, relaxed)
1
mellow(adjective, calm, cool, weak, smooth)
1
mundane(adjective, cool, indifferent, sophisticated, apathetic)
1
negligent(adjective, calm, cool, relaxed, indifferent)
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oblivious(adjective, indifferent, unsympathetic, inattentive, uninterested)
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offhand(adjective, calm, cool, relaxed, indifferent)
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relaxed(adjective, calm, cool, indifferent, casual)
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satiated(adjective, cool, indifferent, sophisticated, apathetic)
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self-centered(adjective, indifferent, unsympathetic, inattentive, uninterested)
1
serene(adjective, calm, cool, relaxed, indifferent)
1
sick of(expression, adjective, cool, indifferent, sophisticated)
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sophisticate(adjective, cool, indifferent, sophisticated, apathetic)
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sophisticated(adjective, cool, indifferent, apathetic)
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stony(adjective, mean, hard, cool, unpleasant)
1
supine(adjective, dull, indifferent, unsympathetic, sluggish)
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APASmart Define. (2016). lukewarm thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/lukewarm/thesaurus/synonyms
ChicagoSmart Define. 2016. "lukewarm thesaurus" https://smartdefine.org/lukewarm/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, lukewarm thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/lukewarm/thesaurus/synonyms>.
MLASmart Define. "lukewarm thesaurus" 14 March 2016. Web. 29 September 2026. <https://smartdefine.org/lukewarm/thesaurus/synonyms>