9
cool(adjective, calm, sound, reasonable, sensible)
9
peaceful(adjective, state, characteristic, coolness)
6
nerveless
4
calm(adjective, quiet, cool, sound, reasonable)
4
level-headed(adjective, calm, sound, sensible, casual)
4
serene(adjective, calm, quiet, relaxed, casual)
3
collected(adjective, calm, quiet, cool, sound)
3
levelheaded(adjective, calm, quiet, cool, reasonable)
2
aloof(adjective, moderate, gentle, temperate)
2
balanced(adjective, calm, sound, reasonable, sensible)
2
composed(adjective, calm, quiet, cool, sound)
2
impassive(adjective, calm, quiet, relaxed, casual)
2
philosophical(adjective, calm, quiet, relaxed, casual)
2
placid(adjective, calm, quiet, relaxed, casual)
2
practical(adjective, calm, sound, reasonable, sensible)
2
quiet(adjective, calm, relaxed, casual, unruffled)
2
rational(adjective, calm, sound, reasonable, sensible)
2
reasonable(adjective, calm, sound, sensible, rational)
2
relaxed(adjective, calm, quiet, casual, unruffled)
2
sane(adjective, calm, sound, reasonable, sensible)
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APASmart Define. (2015). coolheaded thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/coolheaded/thesaurus/synonyms
ChicagoSmart Define. 2015. "coolheaded thesaurus" https://smartdefine.org/coolheaded/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, coolheaded thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/coolheaded/thesaurus/synonyms>.
MLASmart Define. "coolheaded thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/coolheaded/thesaurus/synonyms>