337 entries under adjective topic. ×

9
pivotal(important, serious, basic, prime)
9
senior(noun, rank, master, post)
9
significant(good, great, big, important)
9
staple(lead, head, master, whole)
9
top(noun, advance, great, start)
8
grand(lead, fine, important, head)
8
high(lead, rank, head, master)
8
most important(expression, idiom)
8
number one(noun, expression, order, bad)
8
preeminent(order, bad, great, tough)
8
ruling(excellent, superior, important, head)
8
stellar(great, tough, top, heavy)
7
ace(noun, bad, great, tough)
7
greatest(bad, tough, top, excellent)
7
momentous(good, bad, great, excellent)
7
necessary(body, material, big, important)
7
primal(lead, head, master, boss)
7
radical(great, importance, important, significant)
6
champion(order, bad, character, tough)
6
controlling(top, superior, important, head)
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APASmart Define. (2016). principal thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/principal/thesaurus/synonyms
ChicagoSmart Define. 2016. "principal thesaurus" https://smartdefine.org/principal/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, principal thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/principal/thesaurus/synonyms>.
MLASmart Define. "principal thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/principal/thesaurus/synonyms>