90 entries under important topic. ×

2
number one(adjective, lead, head, master)
2
original(adjective, head, significant, beginning)
2
predominant(adjective, outstanding, significant, original)
2
primitive(adjective, head, significant, beginning)
2
real
2
requisite(significant, original, essential, critical)
2
telling
1
axiological(significant, original, basic, vital)
1
axiomatic(significant, original, basic, vital)
1
bottom(significant, original, basic, vital)
1
bottom-line(significant, original, essential, critical)
1
coal-and-ice(essential, critical, basic, fundamental)
1
constitutional(adjective, significant, original, essential)
1
foundational(significant, original, basic, vital)
1
grass-roots(significant, original, basic, vital)
1
heavy(significant, large, essential, critical)
1
imperative(significant, essential, critical, basic)
1
life-or-death(essential, critical, basic, fundamental)
1
major-league(significant, large, considerable)
1
meat-and-potatoes(significant, original, essential, critical)
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APASmart Define. (2016). key thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/key/thesaurus/synonyms
ChicagoSmart Define. 2016. "key thesaurus" https://smartdefine.org/key/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, key thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/key/thesaurus/synonyms>.
MLASmart Define. "key thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/key/thesaurus/synonyms>