50 entries under plausible topic. ×

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, rational)
7
rational(adjective, sound, reasonable, honest, sensible)
6
thinkable(adjective, possible, mortal, convincing)
5
authentic(adjective, close, open, correct, honest)
4
colorable(adjective, true, realistic, authentic, trustworthy)
3
satisfying(adjective, realistic, authentic, trustworthy, convincing)
3
sound(adjective, reasonable, honest, sensible, solid)
3
arguable(adjective, sound, reasonable, sensible, rational)
3
honest(adjective, close, open, correct, reasonable)
3
solid(open, honest, sensible, realistic, reliable)
3
trusty(adjective, close, correct, reasonable, honest)
3
straight(adjective, close, open, correct, honest)
2
dependable(adjective, close, correct, honest, solid)
2
realistic(adjective, close, open, sound, correct)
2
justifiable(adjective, sound, reasonable, sensible, rational)
2
tried(adjective, close, correct, honest, solid)
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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>