197 entries under important topic. ×

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effective(powerful, useful, running, beneficial)
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effectual(powerful, useful, effective, beneficial)
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epochal(significant, historic)
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eternal
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exalted(adjective, prominent)
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expressive(powerful, effective)
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forceful(powerful, key, effective, conclusive)
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forcible(big, heavy, powerful, substantial)
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hanging by thread(adjective, critical)
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heavy number(expression, significant, historic)
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high-level(adjective, prominent, exalted)
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high-ranking(adjective, prominent, exalted)
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meat and potatoes(expression, idiom, significant, vital)
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mere
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name of the game(expression, idiom, essential, critical)
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newsworthy
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noble(adjective, prominent, exalted)
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on thin ice(adjective, critical)
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overshadowing(great, serious)
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potent(powerful, effective)
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APASmart Define. (2016). crucial thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/crucial/thesaurus/synonyms
ChicagoSmart Define. 2016. "crucial thesaurus" https://smartdefine.org/crucial/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, crucial thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/crucial/thesaurus/synonyms>.
MLASmart Define. "crucial thesaurus" 11 March 2016. Web. 29 September 2026. <https://smartdefine.org/crucial/thesaurus/synonyms>