75 entries under significant topic. ×

4
lofty(adjective, fine, important, noble)
3
exalted(adjective, great, fine, important)
3
impressive(adjective, strong, fine, important, powerful)
3
noble(adjective, solid, important, powerful, outstanding)
3
pivotal(adjective, feature, state, characteristic, important)
3
radical(importance, important, sophisticated, main)
3
remarkable(adjective, great, excellent, solid, important)
2
consequential(adjective, good, important, powerful)
2
effective(adjective, strong, important, powerful, outstanding)
2
focal(important, key, main, chief)
2
puissant(adjective, fine, important, grand)
2
salient(adjective, important, wonderful, exceptional, marvelous)
2
superlative(adjective, bad, tough, top, fine)
1
august(adjective, great, fine, important)
1
fine(adjective, top, excellent, superior, important)
1
high-minded(adjective, fine, important, noble)
1
honorable(adjective, fine, important, noble)
1
name(strong, important, powerful, famous)
1
regal(adjective, fine, important, grand)
1
serious(adjective, good, important, powerful)
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APASmart Define. (2015). leading thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/leading/thesaurus/synonyms
ChicagoSmart Define. 2015. "leading thesaurus" https://smartdefine.org/leading/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, leading thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/leading/thesaurus/synonyms>.
MLASmart Define. "leading thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/leading/thesaurus/synonyms>