3
determinative
3
diagnostic(characteristic, telling, ominous, revealing, suggestive)
3
discernible(adjective, substantial, definite, considerable)
3
distinctive(adjective, extraordinary, superior, unusual, exceptional)
3
distinguishable(adjective, substantial, considerable)
3
donnish(adjective, importance, valuable, main, notable)
3
dynamic(adjective, moving, sharp, energetic, touching)
3
earth-shaking(adjective, important, serious, critical, historic)
3
epoch-making
3
explicit(adjective, severe, sharp, energetic, vigorous)
3
extensive(adjective, big, substantial, large, valuable)
3
extraordinary(adjective, solid, superior, unusual, important)
3
facund(adjective, touching, exciting, stirring, poignant)
3
far reaching(adjective, importance, valuable, main, notable)
3
firm(adjective, substantial, large, key, considerable)
3
first(adjective, superior, unusual, important, rank)
3
generous(adjective, large, considerable)
3
glaring
3
haughty(adjective, importance, valuable, main, notable)
3
healthy(adjective, big, important, substantial, definite)
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APASmart Define. (2016). significant thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/significant/thesaurus/synonyms
ChicagoSmart Define. 2016. "significant thesaurus" https://smartdefine.org/significant/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, significant thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/significant/thesaurus/synonyms>.
MLASmart Define. "significant thesaurus" 4 March 2016. Web. 21 September 2026. <https://smartdefine.org/significant/thesaurus/synonyms>