578 entries under adjective topic. ×

16
remarkable(clear, extraordinary, importance, unusual)
16
great(importance, important, famous, outstanding)
14
historic(importance, important, main, remarkable)
14
impressive(moving, importance, valuable, main)
14
influential(good, clear, great, importance)
14
powerful(good, clear, strong, intense)
14
relevant(clear, appropriate, importance, big)
13
signal(noun, clear, mark, great)
13
portentous(importance, valuable, main, notable)
13
prominent(good, clear, strong, solid)
12
pregnant(open, energetic, importance, sensitive)
12
appreciable(substantial, large, considerable, noticed)
12
chief(superior, big, unusual, important)
12
suggestive(characteristic, open, sensitive, meaning)
12
telling(verb, good, clear, strong)
11
essential(importance, big, important, original)
10
conspicuous(clear, solid, extraordinary, big)
10
goodly(comfort, rich, well, convenient)
10
meaning(show, express, imagination, meaningful)
10
special(superior, unusual, important, strange)
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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>