51 entries under reasonable topic. ×

2
proven(sound, proper, rational, accepted)
2
solid(good, sound, right, proper)
2
substantial(good, sound, right, rational)
2
weighty(good, sound, right, rational)
2
well-founded(good, sound, right, rational)
1
efficacious(good, sound, right, rational)
1
pure(adjective, good, clear, sound, correct)
1
rational(adjective, good, sound, sensible)
1
trustworthy(adjective, good, open, sound, correct)
1
uncorrupted(good, clear, sound, right)
0
attested(good, sound, right, rational)
0
compelling(sound, rational)
0
conclusive(sound, rational)
0
confirmed(good, sound, right, proper)
0
convincing(sound, rational)
0
credible(good, sound, right, rational)
0
determinative(sound, rational)
0
efficient(good, sound, right, rational)
0
in force(expression, good, sound, right)
0
irrefutable(sound, rational)
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APASmart Define. (2016). legal thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/legal/thesaurus/synonyms
ChicagoSmart Define. 2016. "legal thesaurus" https://smartdefine.org/legal/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, legal thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/legal/thesaurus/synonyms>.
MLASmart Define. "legal thesaurus" 29 March 2016. Web. 30 September 2026. <https://smartdefine.org/legal/thesaurus/synonyms>