59 entries under rational topic. ×

21
plausible(adjective, open, sound, reasonable, honest)
20
credible(adjective, close, open, sound, correct)
11
reasonable(adjective, sound, honest, sensible, solid)
10
trustworthy(adjective, close, open, sound, correct)
8
reliable(adjective, close, open, sound, correct)
8
tenable(adjective, sound, reasonable, sensible)
5
acceptable(adjective, sound, reasonable, realistic)
3
sound(adjective, reasonable, honest, sensible, solid)
3
arguable(adjective, sound, reasonable, sensible)
3
sensible(adjective, open, sound, honest, solid)
2
realistic(adjective, close, open, sound, correct)
2
defensible(adjective, sound, reasonable, conceivable)
2
justifiable(adjective, sound, reasonable, sensible)
2
logical(adjective, sound, reasonable, sensible)
2
secure(adjective, open, sound, reasonable, honest)
2
viable(adjective, sound, reasonable, conceivable)
1
advisable(adjective, sound, sensible, intelligent)
1
all there(expression, adjective, sound, sensible)
1
cerebral(adjective, sound, sensible, intelligent)
1
clear-cut(adjective, sound, sensible, intelligent)
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APASmart Define. (2015). believable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/believable/thesaurus/synonyms
ChicagoSmart Define. 2015. "believable thesaurus" https://smartdefine.org/believable/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, believable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/believable/thesaurus/synonyms>.
MLASmart Define. "believable thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/believable/thesaurus/synonyms>