| snappy(adjective, fast) | |
| hurried(verb, adjective) | |
| brilliant | |
| sharp(adjective, sudden) | |
| agile | |
| bright | |
| brisk(adjective, active) | |
| express(adjective, direct, speedy) | |
| fast learner | |
| instant | |
| keen | |
| lightning | |
| prompt(adjective, responsive, early) | |
| quick-witted(adjective, smart, stupid) | |
| quicken(verb, invigorate, faster) | |
| rushed | |
| sage | |
| savvy(dull, rough) | |
| soon | |
| whirlwind(adjective, fast) |
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| APA | Smart Define. (2016). slow thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/slow/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "slow thesaurus" https://smartdefine.org/slow/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, slow thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/slow/thesaurus/antonyms>. |
| MLA | Smart Define. "slow thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/slow/thesaurus/antonyms> |