50 entries under plausible topic. ×

1
aboveboard(adjective, realistic, authentic, trustworthy, convincing)
1
advisable(adjective, sound, sensible, rational, intelligent)
1
all there(expression, adjective, sound, sensible, rational)
1
cerebral(adjective, sound, sensible, rational, intelligent)
1
clear-cut(adjective, sound, sensible, rational, intelligent)
1
cognitive(adjective, sound, sensible, rational, intelligent)
1
conscious(adjective, sound, sensible, rational, intelligent)
1
consequent(adjective, sound, sensible, rational, intelligent)
1
consistent(adjective, sound, sensible, rational, intelligent)
1
levelheaded(adjective, open, sound, honest, sensible)
1
perceiving(adjective, sound, sensible, rational, intelligent)
1
percipient(adjective, sound, sensible, rational, intelligent)
1
ratiocinative(adjective, sound, sensible, rational, intelligent)
1
reasoned(adjective, sound, sensible, rational, intelligent)
1
reasoning(adjective, sound, sensible, rational, intelligent)
1
reflective(adjective, sound, sensible, rational, intelligent)
1
sincere(adjective, close, open, correct, reasonable)
1
thought-out(adjective, sound, sensible, rational, intelligent)
1
thoughtful(adjective, sound, sensible, rational, intelligent)
1
tolerant(adjective, sound, sensible, rational, intelligent)
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APASmart Define. (2015). believable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/believable/thesaurus/synonyms
ChicagoSmart Define. 2015. "believable thesaurus" https://smartdefine.org/believable/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, believable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/believable/thesaurus/synonyms>.
MLASmart Define. "believable thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/believable/thesaurus/synonyms>