52 entries under rational topic. ×
| efficacious(adjective, good, power, sound, right) | |
| powerful(adjective, good, strong, power, direct) | |
| potent(adjective, good, strong, direct, sound) | |
| strong(adjective, good, sound, tough, right) | |
| valid(adjective, power, sound, right, reasonable) | |
| cogent(power, sound, reasonable, violent) | |
| sound(adjective, strong, direct, tough, reasonable) | |
| persuasive(adjective, good, strong, direct, sound) | |
| reasonable(adjective, sound, practical, realistic) | |
| telling(adjective, sound, reasonable, violent) | |
| accurate(sound, reasonable) | |
| authoritative(good, sound, right, reasonable) | |
| compelling(sound, reasonable, violent, aggressive) | |
| convincing(sound, reasonable, influential, winning) | |
| kosher(good, sound, right, reasonable, honest) | |
| legit(good, sound, right, reasonable, honest) | |
| logical(adjective, good, sound, right, reasonable) | |
| official(adjective, good, sound, right, reasonable) | |
| proven(sound, reasonable) | |
| solid(adjective, good, sound, right, reasonable) |
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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> |