63 entries under essential topic. ×

1
coal-and-ice(important, critical, basic, fundamental)
1
constitutive(important, critical, basic, fundamental)
1
de rigueur(expression, adjective, significant, basic)
1
expedient(adjective, significant, basic, vital)
1
fundamental(adjective, important, significant, critical)
1
incumbent on(expression, adjective, significant, basic)
1
integral(important, significant, serious, critical)
1
key(important, significant, critical, basic)
1
meat-and-potatoes(important, critical, basic, fundamental)
1
name(important, critical, fundamental, decisive)
1
name-of-the-game(important, critical, basic, fundamental)
1
name of game(expression, adjective, idiom, significant)
1
nitty-gritty(important, critical, basic, fundamental)
1
prerequisite(adjective, important, significant, critical)
1
quintessential(adjective, significant, basic, vital)
1
specified(adjective, significant, basic, vital)
1
unavoidable(adjective, strong, significant, basic)
1
underlined(important, critical, basic, fundamental)
0
binding(adjective, significant, basic, vital)
0
coal and ice(expression, idiom, important, critical)
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APASmart Define. (2015). urgent thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/urgent/thesaurus/synonyms
ChicagoSmart Define. 2015. "urgent thesaurus" https://smartdefine.org/urgent/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, urgent thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/urgent/thesaurus/synonyms>.
MLASmart Define. "urgent thesaurus" 3 August 2015. Web. 28 September 2026. <https://smartdefine.org/urgent/thesaurus/synonyms>