192 entries under sober topic. ×

5
solid(adjective, good, great, pleasant, reasonable)
4
blank(verb, adjective, detached, unfeeling)
4
deadpan(adjective, calm, dull, flat, detached)
4
demure(adjective, calm, quiet, gentle)
4
impartial(adjective, calm, sound, reasonable, sensible)
4
laid back(expression, adjective, feature, state, calm)
4
prim(adjective, quiet, gentle, thoughtful, aloof)
4
realistic(adjective, calm, sound, reasonable, sensible)
4
serious(adjective, calm, sensible, unusual, relaxed)
4
solemn(adjective, calm, sensible, restrained, thoughtful)
3
immovable(adjective, calm, firm, solid, steady)
3
grave(adjective, calm, sensible, restrained, thoughtful)
3
meticulous(adjective, severe, thoughtful, prudent)
3
normal(adjective, sound, reasonable, sensible, informal)
3
precise(adjective, severe, thoughtful, prudent)
3
prudent(adjective, calm, sound, smooth, reasonable)
3
thoughtful(adjective, good, understanding, kind, sound)
3
tolerant(adjective, feature, state, calm, sound)
3
toneless(adjective, temper, cold, negative, detached)
2
alert(adjective, pleasant, deliberate, familiar, thoughtful)
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APASmart Define. (2016). cool thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/cool/thesaurus/synonyms
ChicagoSmart Define. 2016. "cool thesaurus" https://smartdefine.org/cool/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, cool thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/cool/thesaurus/synonyms>.
MLASmart Define. "cool thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/cool/thesaurus/synonyms>