53 entries under sound topic. ×

26
substantial(adjective, good, strong, right)
16
powerful(adjective, good, clear, strong, great)
15
telling(adjective, clear, strong, great)
12
cogent(adjective, clear, strong, great)
12
persuasive(adjective, good, clear, strong, great)
12
potent(adjective, good, clear, strong, great)
11
strong(adjective, good, clear, right)
9
valid(adjective, clear, right, reasonable)
8
authoritative(adjective, good, strong, right)
8
convincing(adjective, clear, strong, great)
8
solid(adjective, good, clear, right)
6
good(right, reasonable, rational, genuine)
5
compelling(adjective, clear, strong, great)
5
efficacious(adjective, good, strong, right)
5
well-founded(good, right, reasonable, rational)
3
irrefutable(reasonable, rational)
2
authentic(good, right, reasonable, rational)
2
binding(reasonable, rational)
2
conclusive(reasonable, significant, rational, serious)
2
determinative(reasonable, significant, rational, serious)
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APASmart Define. (2015). weighty thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/weighty/thesaurus/synonyms
ChicagoSmart Define. 2015. "weighty thesaurus" https://smartdefine.org/weighty/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, weighty thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/weighty/thesaurus/synonyms>.
MLASmart Define. "weighty thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/weighty/thesaurus/synonyms>