100 entries under logical topic. ×

5
deliberate(adjective, sound, reasonable, sensible, restrained)
5
fair(adjective, good, clear, sound, reasonable)
5
impartial(adjective, sound, reasonable, honest, sensible)
5
legitimate(adjective, clear, sound, reasonable, honest)
5
solid(sound, reasonable, useful, realistic, forceful)
5
temperate(adjective, reasonable, moderate, honest, sensible)
5
well-grounded(adjective, sound, reasonable, reason, forceful)
4
consistent(adjective, clear, sound, reasonable, sensible)
4
objective(adjective, hard, sound, reasonable, honest)
4
reasoned(adjective, adverb, sound, reasonable, sensible)
4
well-advised(adjective, good, sound, reasonable, sensible)
3
abstract(adjective, moral, theoretical, cerebral)
3
articulate(adjective, sound, coherent, silver-tongued)
3
composed(adjective, calm, quiet, sound, reasonable)
3
convincing(adjective, clear, sound, reasonable, sensible)
3
metaphysical(moral, intellect, theoretical)
3
methodical(adjective, coherent, systematic, investigative)
3
philosophic(adjective, sound, reasonable, keen, sensible)
3
serene(adjective, calm, quiet, reasonable, sensible)
3
systematic(sound, coherent, applied, hands-on)
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APASmart Define. (2016). rational thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/rational/thesaurus/synonyms
ChicagoSmart Define. 2016. "rational thesaurus" https://smartdefine.org/rational/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, rational thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/rational/thesaurus/synonyms>.
MLASmart Define. "rational thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/rational/thesaurus/synonyms>