70 entries under principal topic. ×

5
preeminent(adjective, order, top, excellent, superior)
5
significant(adjective, superior, big, unusual, important)
5
top(adjective, excellent, fine, superior, important)
4
controlling(adjective, outstanding, essential, prominent, prime)
4
grand(adjective, lead, fine, important, head)
4
indispensable(adjective, important, significant, original, serious)
4
necessary(adjective, body, material, big, important)
4
prominent(adjective, important, outstanding, head, significant)
4
ruling(adjective, excellent, important, head, significant)
4
stellar(adjective, important, outstanding, prominent, prime)
4
topmost(adjective, top, excellent, fine, superior)
3
champion(adjective, order, top, superior, heavy)
3
consummate(adjective, top, superior)
3
critical(adjective, big, important, significant, substantial)
3
dominating(adjective, important, prominent, prime, chief)
3
headmost(adjective, order, heavy, important, head)
3
influential(adjective, significant, vital, main, chief)
3
inherent(adjective, body, material, natural, animate)
3
intrinsic(adjective, important, significant, original, essential)
2
especial(adjective, superior, unusual, exceptional, distinct)
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APASmart Define. (2016). primary thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/primary/thesaurus/synonyms
ChicagoSmart Define. 2016. "primary thesaurus" https://smartdefine.org/primary/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, primary thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/primary/thesaurus/synonyms>.
MLASmart Define. "primary thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/primary/thesaurus/synonyms>