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

29 entries under significant topic. ×

3
momentous(adjective, important, historic)
2
important(adjective, serious, critical, historic)
1
chips are down(expression, idiom, important, historic)
1
consequential(adjective, important, serious, critical)
1
critical(adjective, important, serious, historic)
1
crucial(adjective, important, serious, critical)
1
decisive(adjective, important, historic)
1
epochal(important, historic)
1
eventful(important, historic)
1
fateful(adjective, important, historic)
1
heavy number(expression, important, historic)
1
historic
1
important serious(expression, important, historic)
1
meaningful(important, serious, critical, historic)
1
memorable(important, historic)
1
of moment(expression, important, historic)
1
outstanding(important, historic)
1
pivotal(adjective, important, serious, critical)
1
vital(important, serious, critical, historic)
1
weighty(adjective, 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>