180 entries under reasonable topic. ×

6
balanced(adjective, calm, sound, soft)
6
levelheaded(adjective, calm, good, quiet, sound)
6
sound(verb, adjective, upset, calm, good)
5
bland(adjective, calm, quiet, weak, smooth)
5
discreet(adjective, calm, quiet, understanding, kind)
5
judicious(adjective, calm, good, sound)
5
solid(adjective, good, great, pleasant)
5
stable(adjective, calm, quiet, sound)
5
subdued(adjective, calm, quiet, moderate)
5
warm(adjective, weak, kind, smooth, pleasant)
4
A-OK(adjective, good, great, pleasant)
4
careful(adjective, calm, soft, gentle)
4
disciplined(adjective, calm, quiet, soft)
4
impartial(adjective, calm, sound, sensible)
4
modest(adjective, close, quiet, moderate)
4
peaceable(adjective, calm, soft, gentle)
4
realistic(adjective, calm, sound, sensible)
4
satisfactory(adjective, good, great, pleasant)
3
cautious(adjective, calm, close, quiet, soft)
3
normal(adjective, sound, sensible, informal)
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APASmart Define. (2016). cool thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/cool/thesaurus/synonyms
ChicagoSmart Define. 2016. "cool thesaurus" https://smartdefine.org/cool/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, cool thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/cool/thesaurus/synonyms>.
MLASmart Define. "cool thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/cool/thesaurus/synonyms>