127 entries under reasonable topic. ×

7
presumptive(adjective, realistic, authentic, satisfying)
6
feasible(adjective, adverb, fair, acceptable)
6
satisfactory(adjective, solid, belief, realistic)
6
trusty(adjective, close, correct, honest)
5
acceptable(adjective, sound, solid, fair)
5
conclusive(adjective, sound, solid, rational)
5
presumable(adjective, solid, fair, acceptable)
5
satisfying(adjective, solid, realistic, authentic)
5
straight(adjective, close, open, correct)
5
true(adjective, close, open, direct, sound)
5
well-founded(good, sound, right, rational)
4
arguable(adjective, sound, sensible, rational)
4
cogent(sound, solid, rational, realistic)
4
justifiable(adjective, sound, sensible, rational)
4
logical(adjective, good, sound, right)
4
persuasive(adjective, good, sound, right)
4
secure(adjective, open, sound, solid)
4
smooth(influential, winning, convincing)
4
unquestionable(adjective, correct, real, genuine)
4
well-grounded(good, sound, right, rational)
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APASmart Define. (2015). credible thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/credible/thesaurus/synonyms
ChicagoSmart Define. 2015. "credible thesaurus" https://smartdefine.org/credible/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, credible thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/credible/thesaurus/synonyms>.
MLASmart Define. "credible thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/credible/thesaurus/synonyms>