79 entries under reasonable topic. ×
| efficacious(adjective, good, power, sound, right) | |
| powerful(adjective, good, strong, power, direct) | |
| good(adjective, sound, right, decent) | |
| serviceable(adjective, open, direct, active) | |
| functional(adjective, strong, open, sensible) | |
| systematic(adjective, sensible, exact, ordinary) | |
| businesslike(adjective, sensible, exact, careful) | |
| potent(adjective, good, strong, direct, sound) | |
| strong(adjective, good, sound, tough, right) | |
| utilitarian(adjective, strong, sensible, useful) | |
| valid(adjective, power, sound, right) | |
| cogent(power, sound, violent, rational) | |
| orderly(adjective, sensible, exact, ordinary) | |
| sound(adjective, strong, direct, tough) | |
| constructive(adjective, sensible, useful, sober) | |
| persuasive(adjective, good, strong, direct, sound) | |
| practicable(adjective, open, sensible, useful) | |
| telling(adjective, sound, violent, rational) | |
| usable(adjective, strong, open, sensible) | |
| workable(adjective, open, sensible, useful) |
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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> |