Synonyms|1.3kAntonyms|350|Broader|9Narrower|12Related|1.5k

79 entries under main topic. ×

3
key-note(adjective, importance, valuable, notable)
3
potent(adjective, clear, strong, important, powerful)
3
responsible(adjective, importance, valuable, notable)
2
arch(adjective, important, rank, grand, post)
2
indispensable(adjective, important, original, serious, essential)
2
mean(verb, adjective, important, essential, basic)
2
of importance(adjective, importance, valuable, notable)
2
paramount(adjective, good, important, original, serious)
2
radical(adjective, great, important, original, serious)
1
capital(adjective, important, serious, critical, prominent)
1
especial(adjective, superior, unusual, exceptional, grand)
1
foremost(important, large, vital, middle)
1
of great moment(adjective, importance, valuable, notable)
1
on the map(adjective, importance, valuable, notable)
1
preeminent(adjective, great, solid, extraordinary, unusual)
1
ruling(adjective, important, essential, prominent, basic)
1
supreme(adjective, extreme, essential, best)
1
topmost(adjective, extreme, essential, best)
0
quintessential(adjective, important, essential, basic, vital)
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ChicagoSmart Define. 2016. "significant thesaurus" https://smartdefine.org/significant/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, significant thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/significant/thesaurus/synonyms>.
MLASmart Define. "significant thesaurus" 4 March 2016. Web. 23 September 2026. <https://smartdefine.org/significant/thesaurus/synonyms>