7
premier(adjective, lead, important, head, beginning)
7
radical(adjective, importance, important, significant, original)
7
red(noun, adjective, shade, colour, color)
6
cape(noun, clothing, wrap, cloak, coat)
6
claret(noun, adjective, glowing, makeup, rose)
6
highest(adjective, heavy, important, outstanding, prominent)
6
organic(adjective, important, significant, original, basic)
6
overruling(adjective, importance, important, serious, essential)
6
preeminent(adjective, important, outstanding, essential, prominent)
6
significant(adjective, important, original, essential, critical)
5
pre-eminent
5
cardinal number(noun, expression, idiom)
5
elementary(adjective, important, head, significant, beginning)
5
master(adjective, lead, head, boss)
5
rudimentary(adjective, important, head, significant, beginning)
5
top(adjective, quality, tough, superior, heavy)
4
arch(adjective, lead, head, master, boss)
4
basal(adjective, lead, important, head, significant)
4
cerise(noun, adjective, colour, glowing, makeup)
4
great
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APASmart Define. (2015). cardinal thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/cardinal/thesaurus/synonyms
ChicagoSmart Define. 2015. "cardinal thesaurus" https://smartdefine.org/cardinal/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, cardinal thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/cardinal/thesaurus/synonyms>.
MLASmart Define. "cardinal thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/cardinal/thesaurus/synonyms>