176 entries under significant topic. ×

6
pregnant(adjective, big, awkward, substantial)
6
signal(adjective, solid, extraordinary, importance, unusual)
6
sound(reasonable, important, powerful, rational)
5
decisive(adjective, powerful, substantial, serious)
5
prominent(strong, extraordinary, importance, unusual, important)
4
chief(adjective, big, important, substantial)
4
eventful(importance, important, historic)
4
pivotal(adjective, important, serious, vital)
4
suggestive(adjective, expressive, loaded, telling)
4
vast(adjective, large, considerable)
3
central(adjective, important, vital, imperative)
3
controlling(adjective, strong, energetic, important, powerful)
3
dangerous(great, severe, important, serious)
3
necessary(big, important, substantial, valuable)
3
striking(adjective, extraordinary, important, powerful, outstanding)
2
admissible(important, consistent, related, applicable)
2
astronomical(substantial, large)
2
charged(adjective, loaded)
2
commanding(adjective, strong, energetic, violent, important)
2
conclusive(sound, reasonable, 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>