77 entries under valuable topic. ×

13
portentous(adjective, importance, main, notable)
12
chief(adjective, superior, big, unusual, important)
11
essential(adjective, importance, big, important, original)
9
decisive(adjective, great, extraordinary, big, important)
9
key(adjective, importance, important, guide, original)
9
principal(adjective, good, great, big, important)
8
big-league(adjective, importance, main, notable)
8
fateful(adjective, importance, main, notable)
8
purposeful(adjective, importance, main, notable)
8
significative(adjective, importance, main, notable)
7
grand(adjective, importance, main, notable)
7
large(adjective, strong, big, important, substantial)
7
pressing(verb, adjective, tough, severe, big)
6
exceptional(adjective, solid, extraordinary, superior, big)
6
marked(adjective, clear, solid, extraordinary, superior)
6
necessary(adjective, big, important, original, substantial)
6
primary(adjective, superior, big, unusual, important)
6
salient(adjective, extraordinary, unusual, important, substantial)
6
solemn(adjective, importance, main, notable)
6
urgent(adjective, clear, tough, severe, big)
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APASmart Define. (2016). significant thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/significant/thesaurus/synonyms
ChicagoSmart Define. 2016. "significant thesaurus" https://smartdefine.org/significant/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, significant thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/significant/thesaurus/synonyms>.
MLASmart Define. "significant thesaurus" 4 March 2016. Web. 24 September 2026. <https://smartdefine.org/significant/thesaurus/synonyms>