119 entries under substantial topic. ×

2
astronomical(significant, large)
2
chunky(adjective, big, heavy, awkward)
2
distinguished(big, unusual, important, wonderful, significant)
2
exceptional(adjective, extraordinary, big, unusual, significant)
2
extensive(big, significant, large, valuable)
2
imperative(big, significant, valuable, vital)
2
importunate(hard, tough, difficult, big, significant)
2
meaty(adjective, big, heavy, significant)
2
much(significant, large)
2
pithy(adjective, strong, energetic, violent, powerful)
2
pointed(adjective, severe, sharp, significant)
2
principal(adjective, great, big, important, significant)
2
reasonable(sound, significant, rational, large)
2
renowned(big, important, significant, large)
2
sizable(significant, large, sturdy, robust)
2
valuable(adjective, big, significant, large)
1
abundant(significant, large, considerable)
1
ad rem(expression, important, significant, serious)
1
big deal(expression, adjective, big, heavy, important)
1
determining(big, significant, valuable, vital)
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APASmart Define. (2015). weighty thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/weighty/thesaurus/synonyms
ChicagoSmart Define. 2015. "weighty thesaurus" https://smartdefine.org/weighty/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, weighty thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/weighty/thesaurus/synonyms>.
MLASmart Define. "weighty thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/weighty/thesaurus/synonyms>