75 entries under sober topic. ×

1
earthy(adjective, hard, sound, tough, rational)
1
feasible(adjective, tough, honest, fair, proper)
1
flat(adjective, tough, rational, straightforward, detached)
1
iceberg(adjective, calm, detached, unfeeling)
1
imperturbable(adjective, calm, detached, unfeeling)
1
judicial(adjective, calm, fair, detached)
1
laid back(expression, adjective, calm, detached)
1
lifeless(adjective, tough, rational, straightforward)
1
moderate(adjective, calm, good, reasonable, clean)
1
mundane(adjective, tough, rational, straightforward)
1
naked(adjective, tough, rational, straightforward)
1
phlegmatic(adjective, tough, indifferent, rational, straightforward)
1
plain(adjective, tough, friendly, appropriate, honest)
1
poker-faced(adjective, calm, indifferent, detached, casual)
1
practical(adjective, hard, sound, tough, excite)
1
pragmatic(adjective, hard, sound, tough, excite)
1
prosy(adjective, tough, rational, straightforward)
1
quiet(adjective, calm, detached, unfeeling)
1
serene(adjective, calm, detached, unfeeling)
1
serious(adjective, tough, rational, straightforward)
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APASmart Define. (2016). objective thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/objective/thesaurus/synonyms
ChicagoSmart Define. 2016. "objective thesaurus" https://smartdefine.org/objective/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, objective thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/objective/thesaurus/synonyms>.
MLASmart Define. "objective thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/objective/thesaurus/synonyms>