- Definitions|2
- Thesaurus|876
- Abbreviations|0
94 entries under adjective topic. ×
| functional | |
| impressive(strong, energetic, powerful, vigorous) | |
| able(strong, power, tough, energetic) | |
| convincing(strong, sound, reasonable, energetic) | |
| practical(useful, helpful, beneficial, advantageous) | |
| puissant(strong, power, energetic, powerful) | |
| serviceable(useful, beneficial, advantageous, efficient) | |
| virtuous(tough, energetic, effective, adept) | |
| weighty(good, strong, sound, right) | |
| authoritative(good, strong, sound, right) | |
| compelling(strong, sound, reasonable, energetic) | |
| energetic(strong, tough, vigorous, capable) | |
| forcible(strong, energetic, important, powerful) | |
| helpful(useful, beneficial, advantageous, optimistic) | |
| important(strong, powerful, significant, useful) | |
| substantial(good, strong, sound, right) | |
| in force(strong, power, valid, legal) | |
| proficient(tough, effective, adept, effectual) | |
| significant(strong, important, powerful, useful) | |
| stiff |
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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> |