109 entries under rational topic. ×

7
secure(adjective, good, clear, sound, reasonable)
6
equitable(adjective, feature, characteristic, good, open)
6
powerful(good, sound, right, reasonable, solid)
5
legitimate(adjective, good, open, sound, correct)
5
plausible(adjective, sound, reasonable, solid)
5
substantial(good, sound, right, reasonable)
4
tested(good, sound, right, reasonable)
4
well-founded(good, sound, right, reasonable)
3
bona fide(expression, adjective, idiom, good, open)
3
tenable(adjective, sound, reasonable, realistic)
3
persuasive(good, sound, right, reasonable, solid)
2
cogent(adjective, good, sound, reasonable, sensible)
2
compelling(sound, reasonable, realistic, persuasive)
2
fair-minded(adjective, reasonable, honest, fair, pure)
2
kosher(adjective, good, open, sound, correct)
2
logical(adjective, good, sound, right, reasonable)
2
proven(adjective, good, sound, right, reasonable)
2
reasonable(adjective, good, sound, clean, honest)
2
well-grounded(good, sound, right, reasonable)
1
on the level(expression, adjective, idiom, good, close)
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APASmart Define. (2015). trustworthy thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/trustworthy/thesaurus/synonyms
ChicagoSmart Define. 2015. "trustworthy thesaurus" https://smartdefine.org/trustworthy/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, trustworthy thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/trustworthy/thesaurus/synonyms>.
MLASmart Define. "trustworthy thesaurus" 24 October 2015. Web. 29 September 2026. <https://smartdefine.org/trustworthy/thesaurus/synonyms>