13
authoritative(adjective, strong, powerful, significant, subject)
13
cardinal(adjective, essential, significant, basic, vital)
12
indispensable(adjective, characteristic, importance, significant, significance)
11
esteemed(adjective, characteristic, useful, beneficial, feature)
11
exceptional(adjective, great, bad, excellent, extraordinary)
11
seminal(adjective, characteristic, importance, outstanding, significant)
10
extraordinary(adjective, outstanding, worthy, great, unusual)
10
fundamental(adjective, significant, essential, basic, main)
10
potent(adjective, powerful, effective, strong, eminent)
10
pre-eminent(adjective, characteristic, power, influence)
10
special(adjective, bad, great, excellent, superior)
10
supreme(adjective, characteristic, importance, significance, greatness)
10
telling(adjective, strong, energetic, powerful, significant)
10
worthy(adjective, useful, comfortable, wealth, safe)
10
respected(adjective, useful, beneficial, characteristic, power)
9
big-league(adjective, valuable, importance, main, notable)
9
earnest(adjective, valuable, importance, substantial, main)
9
memorable(adjective, great, importance, unusual, lively)
9
predominant(adjective, essential, main, bad, great)
9
distinctive(adjective, characteristic, importance, outstanding, worthy)
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APASmart Define. (2016). important thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/important/thesaurus/synonyms
ChicagoSmart Define. 2016. "important thesaurus" https://smartdefine.org/important/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, important thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/important/thesaurus/synonyms>.
MLASmart Define. "important thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/important/thesaurus/synonyms>