44
effectual(adjective, strong, power, thrive, valid)
40
powerful(adjective, clear, strong, power, great)
35
useful(adjective, valuable, practical, running, alive)
30
efficacious(adjective, strong, power, moving, tough)
28
efficient(adjective, good, strong, power, tough)
25
operative(adjective, strong, power, active, valid)
25
telling(adjective, clear, strong, great, energetic)
25
impressive(adjective, strong, sharp, powerful, noble)
24
potent(adjective, clear, strong, great, tough)
23
strong(adjective, clear, strong, power, tough)
23
forceful(adjective, clear, strong, power, tough)
23
influential(adjective, clear, strong, great, influence)
22
productive(adjective, power, tough, energetic, lively)
20
capable(adjective, power, tough, keen, smart)
19
compelling(adjective, clear, strong, great, energetic)
18
active(adjective, movement, strong, moving, tough)
18
beneficial(adjective, feature, characteristic, good, honor)
17
practical(adjective, good, useful, valuable, experienced)
16
valid(adjective, strong, power, legal, productive)
16
impactful
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APASmart Define. (2015). effective thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/effective/thesaurus/synonyms
ChicagoSmart Define. 2015. "effective thesaurus" https://smartdefine.org/effective/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, effective thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/effective/thesaurus/synonyms>.
MLASmart Define. "effective thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/effective/thesaurus/synonyms>