- Definitions|2
- Thesaurus|876
- Abbreviations|0
50 entries under sound topic. ×
| powerful(adjective, good, strong, power) | |
| efficient(adjective, good, power, right) | |
| telling(adjective, strong, energetic, powerful) | |
| cogent(adjective, strong, power, reasonable) | |
| convincing(adjective, strong, reasonable, energetic) | |
| weighty(adjective, good, strong, right) | |
| authoritative(adjective, good, strong, right) | |
| compelling(adjective, strong, reasonable, energetic) | |
| substantial(adjective, good, strong, right) | |
| good(right, reasonable, rational, genuine) | |
| logical(good, right, reasonable, rational) | |
| accurate(reasonable, sensible, rational, wise) | |
| correct(adjective, happy, flawless, fortunate) | |
| just(adjective, good, right, reasonable) | |
| legal(good, right, reasonable, rational) | |
| rational(reasonable, sensible, wise, shrewd) | |
| right(adjective, good, reasonable, happy) | |
| satisfactory(adjective, happy, flawless, fortunate) | |
| true(reasonable, rational) | |
| trustworthy(good, right, reasonable, rational) |
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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> |