337 entries under adjective topic. ×

6
crucial(great, big, important, significant)
6
focal(key, chief, focus, foremost)
6
great(bad, excellent, superior, big)
6
prevalent(free, top, superior, usual)
6
ranking
6
substantial(big, important, significant, large)
5
best(top, excellent, lead, important)
5
big(important, significant, substantial, large)
5
core(lead, importance, head, master)
5
elemental(body, material, important, significant)
5
eminent(good, bad, great, excellent)
5
flagship(lead, head, master, boss)
5
general(lead, guide, head, usual)
5
incomparable(bad, tough, top, perfect)
5
peerless(bad, tough, top, perfect)
5
starring
5
topmost(top, excellent, fine, superior)
5
underlying(important, significant, original, essential)
4
basal(body, lead, material, important)
4
base(noun, part, lead, 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>