- Definitions|2
- Thesaurus|876
- Abbreviations|0
65 entries under strong topic. ×
| effective(adjective, power, moving, tough) | |
| effectual(adjective, power, thrive, valid) | |
| powerful(adjective, good, power, sound) | |
| operative(adjective, power, valid, legal) | |
| potent(adjective, good, tough, powerful) | |
| influential(adjective, energetic, important, powerful) | |
| persuasive(adjective, energetic, powerful, capable) | |
| useful(adjective, tough, powerful, effective) | |
| forceful(adjective, power, valid, legal) | |
| telling(adjective, sound, energetic, powerful) | |
| capable(adjective, power, tough, energetic) | |
| competent(adjective, power, tough, energetic) | |
| cogent(adjective, power, sound, reasonable) | |
| valid(adjective, power, right, genuine) | |
| impressive(adjective, energetic, powerful, vigorous) | |
| able(adjective, power, tough, energetic) | |
| convincing(adjective, sound, reasonable, energetic) | |
| puissant(adjective, power, energetic, powerful) | |
| weighty(adjective, good, sound, right) | |
| authoritative(adjective, good, sound, right) |
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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> |