44 entries under authoritative topic. ×

32
effective(adjective, strong, power, thrive, valid)
25
powerful(adjective, strong, power, keen, smart)
23
efficacious(adjective, strong, power, thrive, valid)
19
potent(adjective, strong, sharp, powerful, effective)
19
strong(adjective, power, valid, influential, legal)
18
efficient(adjective, power, excellent, keen, smart)
15
useful(adjective, tough, effective, beneficial, advantageous)
14
telling(verb, adjective, strong, energetic, important)
14
valid(adjective, strong, power, influential, legal)
12
adequate(adjective, power, tough, competent, capable)
12
authoritative(adjective, strong, energetic, powerful, effective)
12
influential(adjective, strong, energetic, important, powerful)
11
capable(adjective, strong, power, keen, smart)
11
productive(adjective, power, tough, useful, effective)
9
legal(adjective, influential)
9
sound(adjective, complete, important, powerful, healthy)
8
important(adjective, powerful, useful, effective, beneficial)
8
practicable(adjective, influential, utilizable)
8
serviceable(adjective, useful, beneficial, advantageous, influential)
7
impressive(adjective, sharp, important, powerful, effective)
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APASmart Define. (2015). effectual thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/effectual/thesaurus/synonyms
ChicagoSmart Define. 2015. "effectual thesaurus" https://smartdefine.org/effectual/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, effectual thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/effectual/thesaurus/synonyms>.
MLASmart Define. "effectual thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/effectual/thesaurus/synonyms>