448 entries under adjective topic. ×

44
effectual(strong, power, thrive, valid)
40
powerful(clear, strong, power, great)
35
useful(valuable, practical, running, alive)
30
efficacious(strong, power, moving, tough)
28
efficient(good, strong, power, tough)
25
operative(strong, power, active, valid)
25
telling(clear, strong, great, energetic)
25
impressive(strong, sharp, powerful, noble)
24
potent(clear, strong, great, tough)
23
strong(clear, strong, power, tough)
23
forceful(clear, strong, power, tough)
23
influential(clear, strong, great, influence)
22
productive(power, tough, energetic, lively)
20
capable(power, tough, keen, smart)
19
compelling(clear, strong, great, energetic)
18
active(movement, strong, moving, tough)
18
beneficial(feature, characteristic, good, honor)
17
practical(good, useful, valuable, experienced)
16
valid(strong, power, legal, productive)
15
persuasive(clear, strong, great, tough)
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APASmart Define. (2015). effective thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/effective/thesaurus/synonyms
ChicagoSmart Define. 2015. "effective thesaurus" https://smartdefine.org/effective/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, effective thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/effective/thesaurus/synonyms>.
MLASmart Define. "effective thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/effective/thesaurus/synonyms>