93 entries under rational topic. ×

46
believable(adjective, close, open, sound, correct)
37
plausible(adjective, open, sound, reasonable, honest)
32
trustworthy(adjective, good, close, sound, correct)
25
reliable(adjective, close, open, sound, correct)
21
reasonable(adjective, sound, sensible, solid, fair)
14
tenable(adjective, sound, reasonable, sensible)
11
authentic(adjective, good, close, open, sound)
10
sound(adjective, reasonable, sensible, solid)
7
good(adjective, sound, right, reasonable)
5
acceptable(adjective, sound, reasonable, solid, fair)
5
conclusive(adjective, sound, reasonable, solid)
5
sensible(adjective, open, sound, honest, solid)
5
true(adjective, close, open, direct, sound)
5
well-founded(good, sound, right, reasonable)
4
arguable(adjective, sound, reasonable, sensible)
4
cogent(sound, reasonable, solid, realistic)
4
justifiable(adjective, sound, reasonable, sensible)
4
logical(adjective, good, sound, right, reasonable)
4
secure(adjective, open, sound, reasonable, solid)
4
well-grounded(good, sound, right, reasonable)
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APASmart Define. (2015). credible thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/credible/thesaurus/synonyms
ChicagoSmart Define. 2015. "credible thesaurus" https://smartdefine.org/credible/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, credible thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/credible/thesaurus/synonyms>.
MLASmart Define. "credible thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/credible/thesaurus/synonyms>