8
useful(adjective, beneficial, characteristic, excellent, friendly)
7
controlling(adjective, powerful, strong, effective, characteristic)
7
far-reaching(adjective, characteristic, feature, severe, importance)
7
life-and-death(adjective, heavy, important, serious, critical)
7
life-or-death(adjective, essential, critical, fundamental, imperative)
7
major-league(adjective, strong, great, powerful, unusual)
7
noticeable(adjective, solid, extraordinary, unusual, strange)
7
of import(expression, adjective, idiom, characteristic, importance)
7
solid(adjective, outstanding, characteristic, extraordinary, importance)
7
strong(adjective, solid, energetic, big, powerful)
7
worthwhile(adjective, good, sensible, significant, useful)
6
basic(adjective, significant, essential, vital, main)
6
estimable(adjective, excellent, sensible, useful, valuable)
6
extensive(adjective, substantial, feature, characteristic, trait)
6
front-page(adjective, feature, characteristic, trait, outstanding)
6
imposing(adjective, influential, characteristic, great, importance)
6
formidable(adjective, characteristic, power, influence)
6
high-up(adjective, importance, valuable, main, notable)
6
honored(adjective, eminent, characteristic, great, excellent)
6
honoured(adjective, characteristic, importance, preeminence)
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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>