Synonyms|76Antonyms|1|Broader|0Narrower|0Related|2

29 entries under significant topic. ×

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big(important, historic)
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considerable(important, historic)
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earth-shattering(adjective, important, serious, critical)
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far-reaching(important, historic)
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grave(important, historic)
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heavy(important, historic)
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material(important, historic)
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notable(important, historic)
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substantial(important, historic)
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APASmart Define. (2013). earth-shaking thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/earth-shaking/thesaurus/synonyms
ChicagoSmart Define. 2013. "earth-shaking thesaurus" https://smartdefine.org/earth-shaking/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2013, earth-shaking thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/earth-shaking/thesaurus/synonyms>.
MLASmart Define. "earth-shaking thesaurus" 18 May 2013. Web. 29 September 2026. <https://smartdefine.org/earth-shaking/thesaurus/synonyms>