139 entries under reasonable topic. ×

7
presumptive(adjective, realistic, authentic, satisfying)
6
cogent(adjective, clear, sound, sensible)
6
colorable(adjective, true, realistic, authentic)
6
thinkable(adjective, fair, acceptable, realistic)
6
trustworthy(adjective, sound, solid, rational)
5
justifiable(adjective, clear, sound, slight)
5
most likely(expression, clear, sound, sensible)
5
persuasive(adjective, smooth, solid, effective)
5
reliable(adjective, open, sound, honest)
5
valid(adjective, open, sensible, proper)
4
apt(adjective, fair, acceptable, expected)
4
arguable(adjective, sound, sensible, rational)
4
defensible(adjective, sound, rational, vindication)
4
excusable(adjective, sound, rational, vindication)
4
intelligent(adjective, clear, sound, sensible)
4
seeming(adjective, fair, false, dishonest)
4
unquestionable(adjective, realistic, authentic, satisfying)
4
verisimilar(adjective, fair, acceptable, expected)
4
wise(adjective, clear, sound, sensible)
3
judicious(adjective, clear, sound, honest)
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APASmart Define. (2015). plausible thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/plausible/thesaurus/synonyms
ChicagoSmart Define. 2015. "plausible thesaurus" https://smartdefine.org/plausible/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, plausible thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/plausible/thesaurus/synonyms>.
MLASmart Define. "plausible thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/plausible/thesaurus/synonyms>