112 entries under big topic. ×

2
extensive(significant, substantial, large, valuable)
2
imperative(significant, substantial, valuable, vital)
2
importunate(hard, tough, difficult, significant)
2
meaty(adjective, heavy, significant, substantial)
2
principal(adjective, great, important, significant)
2
renowned(important, significant, substantial, large)
2
thickset(adjective, solid, heavy, large)
2
valuable(adjective, significant, substantial, large)
2
worthwhile(adjective, strong, solid, important)
1
big deal(expression, adjective, heavy, important)
1
blimp(adjective, heavy, stout, inflated)
1
bovine(adjective, heavy, large, stout)
1
bulging(adjective, heavy, large, stout)
1
bull(adjective, heavy, large, stout)
1
butterball(adjective, heavy, large, stout)
1
determining(significant, substantial, valuable, vital)
1
distended(adjective, heavy, large, stout)
1
doozie(important, significant, substantial, large)
1
dumpy(adjective, heavy, round, stout)
1
dynamite(important, significant, substantial, large)
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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>