86 entries under sober topic. ×

1
engrossed(adjective, keen, deep, rational, intelligent)
1
farsighted(adjective, calm, sound, keen, sensible)
1
grave(adjective, calm, quiet, keen, dark)
1
keen(adjective, smart, bright, sensible, rational)
1
lost in thought(expression, adjective, idiom, keen)
1
meditative(adjective, keen, deep, rational, intelligent)
1
melancholy(adjective, keen, deep, rational, thoughtful)
1
museful(adjective, keen, deep, rational, thoughtful)
1
musing(adjective, keen, deep, rational, thoughtful)
1
pensive(adjective, keen, deep, rational, intelligent)
1
philosophic(adjective, sound, keen, sensible, deep)
1
pondering(adjective, keen, deep, rational, thoughtful)
1
preoccupied(adjective, keen, deep, rational, thoughtful)
1
rapt(adjective, keen, deep, rational, thoughtful)
1
reflecting(adjective, keen, deep, rational, thoughtful)
1
retrospective(adjective, keen, deep, rational, thoughtful)
1
studious(adjective, sound, keen, solid, deep)
1
subjective(adjective, keen, deep, rational, thoughtful)
1
well-reasoned(adjective, rational, wise, realistic)
1
wistful(adjective, keen, deep, rational, thoughtful)
10 years ago|42k views|share |citing 
APASmart Define. (2016). reasonable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/reasonable/thesaurus/synonyms
ChicagoSmart Define. 2016. "reasonable thesaurus" https://smartdefine.org/reasonable/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, reasonable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/reasonable/thesaurus/synonyms>.
MLASmart Define. "reasonable thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/reasonable/thesaurus/synonyms>