72 entries under sober topic. ×

1
clear-cut(adjective, sound, sensible, rational, intelligent)
1
cogitative(adjective, reasonable, keen, deep, rational)
1
commonsensical(adjective, sound, sensible, rational, intelligent)
1
consequent(adjective, sound, reasonable, sensible, rational)
1
consistent(adjective, sound, sensible, rational, intelligent)
1
contemplative(adjective, reasonable, keen, deep, rational)
1
cool(adjective, sound, reasonable, sensible, rational)
1
credible(adjective, sound, sensible, rational, intelligent)
1
deliberative(adjective, reasonable, keen, deep, rational)
1
discerning(adjective, sound, reasonable, keen, sensible)
1
earnest(adjective, reasonable, keen, deep, rational)
1
engrossed(adjective, reasonable, keen, deep, rational)
1
farsighted(adjective, reasonable, keen, deep, rational)
1
grave(adjective, reasonable, keen, deep, rational)
1
intent(adjective, reasonable, keen, deep, rational)
1
judicious(adjective, sound, reasonable, sensible, rational)
1
justifiable(adjective, sound, sensible, rational, intelligent)
1
keen(adjective, reasonable, deep, rational, thoughtful)
1
levelheaded(adjective, sound, reasonable, sensible, rational)
1
lost in thought(expression, adjective, idiom, reasonable)
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APASmart Define. (2015). cerebral thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/cerebral/thesaurus/synonyms
ChicagoSmart Define. 2015. "cerebral thesaurus" https://smartdefine.org/cerebral/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, cerebral thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/cerebral/thesaurus/synonyms>.
MLASmart Define. "cerebral thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/cerebral/thesaurus/synonyms>