115 entries under important topic. ×

6
greatest(adjective, top, excellent, superior)
5
best(adjective, excellent, lead, superior, unusual)
5
great(adjective, significant, vital, imperative)
5
inaugural(adjective, order, heavy, head)
5
momentous(adjective, superior, big, unusual)
5
number one(expression, adjective, order, lead, heavy)
5
preeminent(adjective, order, top, excellent, superior)
5
significant(adjective, superior, big, unusual)
5
top(adjective, excellent, fine, superior)
4
constitutive(original, serious, basic, prime)
4
focal(adjective, significant, key, main)
4
grand(adjective, lead, fine, head)
4
indispensable(adjective, significant, original, serious)
4
material(adjective, body, big, significant)
4
necessary(adjective, body, material, big)
4
prominent(adjective, outstanding, head, significant)
4
ruling(adjective, excellent, head, significant)
4
stellar(adjective, outstanding, prominent, prime)
4
underived(adjective, rough, significant, original)
3
big(significant, substantial, large, serious)
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APASmart Define. (2016). primary thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/primary/thesaurus/synonyms
ChicagoSmart Define. 2016. "primary thesaurus" https://smartdefine.org/primary/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, primary thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/primary/thesaurus/synonyms>.
MLASmart Define. "primary thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/primary/thesaurus/synonyms>