94 entries under adjective topic. ×

31
effective(strong, power, moving, tough)
26
effectual(strong, power, thrive, valid)
21
powerful(good, strong, power, sound)
17
productive(power, tough, energetic, useful)
16
efficient(good, power, sound, right)
15
operative(strong, power, valid, legal)
15
strong(power, valid, legal, efficient)
14
potent(good, strong, tough, powerful)
12
influential(strong, energetic, important, powerful)
12
persuasive(strong, energetic, powerful, capable)
12
useful(strong, tough, powerful, effective)
11
forceful(strong, power, valid, legal)
11
telling(strong, sound, energetic, powerful)
10
successful(happy, useful, helpful, effective)
9
active(movement, moving, tough, energetic)
9
capable(strong, power, tough, energetic)
9
competent(strong, power, tough, energetic)
8
adequate(power, tough, energetic, effective)
8
cogent(strong, power, sound, reasonable)
8
valid(strong, power, right, genuine)
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APASmart Define. (2015). efficacious thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/efficacious/thesaurus/synonyms
ChicagoSmart Define. 2015. "efficacious thesaurus" https://smartdefine.org/efficacious/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, efficacious thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/efficacious/thesaurus/synonyms>.
MLASmart Define. "efficacious thesaurus" 13 October 2015. Web. 22 September 2026. <https://smartdefine.org/efficacious/thesaurus/synonyms>