70 entries under primary topic. ×

7
matchless(adjective, bad, tough, top, perfect)
7
momentous(adjective, feature, state, characteristic, good)
7
significant(adjective, good, important, powerful, rank)
5
fundamental(adjective, important, head, significant, beginning)
5
prevailing(adjective, attractive, suitable, prominent, prime)
5
topmost(adjective, top, excellent, lead, fine)
4
basic(adjective, important, head, significant, beginning)
4
incomparable(adjective, bad, tough, top, solid)
3
big(adjective, important, famous, familiar, large)
3
inaugural(adjective, order, heavy, important, head)
3
initiatory(adjective, beginning, opening, original, first)
3
unparalleled(adjective, bad, tough, top, perfect)
2
consequential(adjective, good, important, powerful, significant)
2
most important(expression, adjective, idiom, order, top)
2
number one(expression, adjective, order, quality, top)
2
pioneer(adjective, head, beginning, original, prime)
2
primo(adjective, order, quality, bad, tough)
2
transcendent(adjective, bad, tough, top, perfect)
2
unequaled(adjective, bad, tough, top, perfect)
2
vital(adjective, top, importance, important, serious)
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APASmart Define. (2015). leading thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/leading/thesaurus/synonyms
ChicagoSmart Define. 2015. "leading thesaurus" https://smartdefine.org/leading/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, leading thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/leading/thesaurus/synonyms>.
MLASmart Define. "leading thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/leading/thesaurus/synonyms>