- Definitions|2
- Thesaurus|876
- Abbreviations|0
46 entries under tough topic. ×
| effective(adjective, strong, power, moving) | |
| powerful(adjective, good, strong, power, sound) | |
| productive(adjective, power, energetic, useful) | |
| potent(adjective, good, strong, powerful) | |
| useful(adjective, strong, powerful, effective) | |
| active(adjective, movement, moving, energetic) | |
| capable(adjective, strong, power, energetic) | |
| competent(adjective, strong, power, energetic) | |
| adequate(adjective, power, energetic, effective) | |
| able(adjective, strong, power, energetic) | |
| virtuous(adjective, energetic, effective, adept) | |
| energetic(adjective, strong, vigorous, capable) | |
| equal to(verb, expression, phrasal verb, power) | |
| proficient(adjective, effective, adept, effectual) | |
| dynamic(adjective, strong, energetic, powerful) | |
| economic(adjective, energetic, effective, adept) | |
| valuable(energetic, useful, effective, beneficial) | |
| apt(adjective, happy, energetic, active) | |
| businesslike(energetic, effective, adept, effectual) | |
| conducive(energetic, useful, effective, beneficial) |
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| APA | Smart Define. (2015). efficacious thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/efficacious/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "efficacious thesaurus" https://smartdefine.org/efficacious/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, efficacious thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/efficacious/thesaurus/synonyms>. |
| MLA | Smart Define. "efficacious thesaurus" 13 October 2015. Web. 22 September 2026. <https://smartdefine.org/efficacious/thesaurus/synonyms> |