84 entries under tough topic. ×

4
adept(adjective, bright, expert, competent)
4
apt(adjective, good, clear, keen)
4
handy(adjective, good, useful, valuable)
4
practiced(adjective, keen, smart, energetic)
4
skillful(adjective, keen, smart, bright)
4
valuable(adjective, good, energetic, proper)
3
accomplished(adjective, keen, smart, energetic)
3
businesslike(adjective, practical, controlled, orderly)
3
driving(adjective, strong, sharp, energetic)
3
equal to(verb, expression, phrasal verb, power)
3
expert(adjective, keen, smart, energetic)
3
robust(adjective, strong, hard, sharp)
3
skilled(adjective, keen, smart, energetic)
2
decisive(important, powerful, adept, effectual)
2
economic(adjective, adept, effectual, well-organized)
2
hale(adjective, strong, energetic, powerful)
2
healthy(adjective, strong, energetic, powerful)
2
intense(adjective, strong, energetic, violent)
2
qualified(adjective, keen, smart, energetic)
2
vital(adjective, strong, energetic, powerful)
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APASmart Define. (2015). effective thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/effective/thesaurus/synonyms
ChicagoSmart Define. 2015. "effective thesaurus" https://smartdefine.org/effective/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, effective thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/effective/thesaurus/synonyms>.
MLASmart Define. "effective thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/effective/thesaurus/synonyms>