53 entries under sound topic. ×
| efficacious(adjective, good, power, right) | |
| powerful(adjective, good, strong, power, direct) | |
| good(adjective, right, reasonable, decent) | |
| potent(adjective, good, strong, direct) | |
| strong(adjective, good, tough, right) | |
| valid(adjective, power, right, reasonable) | |
| cogent(power, reasonable, violent, rational) | |
| persuasive(adjective, good, strong, direct) | |
| reasonable(adjective, rational, practical, realistic) | |
| telling(adjective, reasonable, violent, rational) | |
| accurate(reasonable, rational) | |
| authoritative(good, right, reasonable, rational) | |
| compelling(reasonable, violent, rational, aggressive) | |
| convincing(reasonable, rational, influential, winning) | |
| kosher(good, right, reasonable, honest) | |
| legit(good, right, reasonable, honest) | |
| logical(adjective, good, right, reasonable) | |
| official(adjective, good, right, reasonable) | |
| proven(reasonable, rational) | |
| rational(reasonable, practical, realistic, applied) |
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| APA | Smart Define. (2015). efficient thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/efficient/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "efficient thesaurus" https://smartdefine.org/efficient/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, efficient thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/efficient/thesaurus/synonyms>. |
| MLA | Smart Define. "efficient thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/efficient/thesaurus/synonyms> |