5
efficacious(adjective, good, strong, sound, right)
5
monstrous
5
no-nonsense(adjective, dull, severe, honest, dark)
5
noteworthy(adjective, solid, extraordinary, big, unusual)
5
prominent(strong, extraordinary, importance, unusual, important)
5
thoughtful(adjective, quiet, set, severe, honest)
5
titanic(adjective, strong, energetic, violent, powerful)
5
well-founded(good, sound, right, reasonable, rational)
4
chief(adjective, big, important, significant, substantial)
4
colossal
4
distressing(adjective, hurt, angry, sore, dispiritedness)
4
enormous
4
eventful(importance, important, significant, historic)
4
gigantic
4
immense
4
impenetrable
4
labored
4
leading
4
mammoth
4
pivotal(adjective, important, significant, serious, vital)
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APASmart Define. (2015). weighty thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/weighty/thesaurus/synonyms
ChicagoSmart Define. 2015. "weighty thesaurus" https://smartdefine.org/weighty/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, weighty thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/weighty/thesaurus/synonyms>.
MLASmart Define. "weighty thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/weighty/thesaurus/synonyms>