42 entries under reasonable topic. ×

8
ruminative(adjective, rational, thoughtful, sober)
3
reflective(adjective, keen, deep, rational)
3
contemplative(adjective, keen, deep, rational)
3
pensive(adjective, keen, deep, rational)
3
thoughtful(adjective, keen, deep, sober)
1
absorbed(adjective, keen, deep, rational)
1
analytical(adjective, keen, deep, rational)
1
brainy(adjective, keen, deep, rational)
1
calculating(adjective, keen, deep, rational)
1
cerebral(adjective, keen, deep, rational)
1
cogitative(adjective, keen, deep, rational)
1
deep(adjective, keen, rational, thoughtful)
1
deliberative(adjective, keen, deep, rational)
1
discerning(adjective, keen, deep, rational)
1
earnest(adjective, keen, deep, rational)
1
engrossed(adjective, keen, deep, rational)
1
farsighted(adjective, keen, deep, rational)
1
grave(adjective, keen, deep, rational)
1
intellectual(adjective, keen, deep, rational)
1
intent(adjective, keen, deep, rational)
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APASmart Define. (2015). retrospective thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/retrospective/thesaurus/synonyms
ChicagoSmart Define. 2015. "retrospective thesaurus" https://smartdefine.org/retrospective/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, retrospective thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/retrospective/thesaurus/synonyms>.
MLASmart Define. "retrospective thesaurus" 26 October 2015. Web. 25 September 2026. <https://smartdefine.org/retrospective/thesaurus/synonyms>