78 entries under significant topic. ×

2
paramount(direct, prompt, important, serious)
2
salient(adjective, sharp, big, important)
2
signal(adjective, great, extraordinary, lively)
2
substantial(adjective, big, heavy, important)
1
big(heavy, important, substantial, valuable)
1
big-league(great, extraordinary, heavy, outstanding)
1
chief(adjective, great, big, heavy)
1
earnest(big, heavy, substantial, valuable)
1
earth-shaking(adjective, important, serious, historic)
1
earth-shattering(important, serious, historic)
1
eventful(adjective, great, extraordinary, important, lively)
1
exceptional(great, big, heavy, substantial)
1
far-reaching(big, important, substantial, valuable)
1
foremost(vital, key, earnest, chief)
1
front-page(great, big, heavy, substantial)
1
importunate(adjective, hard, tough, difficult, big)
1
memorable(adjective, important, lively, outstanding)
1
of moment(expression, big, important, substantial)
1
of note(expression, big, substantial, valuable)
1
of substance(expression, big, substantial, valuable)
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APASmart Define. (2016). critical thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/critical/thesaurus/synonyms
ChicagoSmart Define. 2016. "critical thesaurus" https://smartdefine.org/critical/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, critical thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/critical/thesaurus/synonyms>.
MLASmart Define. "critical thesaurus" 16 February 2016. Web. 27 September 2026. <https://smartdefine.org/critical/thesaurus/synonyms>