123 entries under reasonable topic. ×

5
legitimate(adjective, clear, sound, sensible)
5
plausible(adjective, clear, sound, sensible)
5
satisfying(adjective, good, clear, sensible)
5
substantial(sound, rational)
5
well-grounded(adjective, good, sound, correct)
4
authoritative(adjective, strong, sound, energetic)
4
credible(sound, solid, rational, realistic)
4
efficacious(adjective, strong, power, sound)
4
intelligent(adjective, clear, sound, sensible)
4
reliable(adjective, good, sensible, solid)
4
wise(adjective, clear, sound, sensible)
3
pertinent(adjective, clear, sound, sensible)
3
relevant(adjective, clear, sound, sensible)
2
accurate(adjective, sound, correct, proper)
2
admissible(sensible, natural, normal, valid)
2
analytic(adjective, clear, sound, sensible)
2
binding(sound, rational)
2
clear(adjective, sensible, definite, precise)
2
coherent(adjective, clear, sound, sensible)
2
consistent(clear, sound, sensible, natural)
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APASmart Define. (2016). cogent thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/cogent/thesaurus/synonyms
ChicagoSmart Define. 2016. "cogent thesaurus" https://smartdefine.org/cogent/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, cogent thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/cogent/thesaurus/synonyms>.
MLASmart Define. "cogent thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/cogent/thesaurus/synonyms>