| brief(adjective, fast, quick, rapid, speedy) |
| high-speed(adjective, quick, rapid, speedy) |
| light-footed(adjective, fast) |
| mercurial(fast, quick, velocity, rapid, speedy) |
| posthaste(adjective, adverb, hot, fast, quick) |
| rushing(adjective, fast) |
| snap(hot, quick, rapid, nimble, speedy) |
| sprightly(adjective, fast, rapid, swift) |
| summary(noun, prompt, fast, quick, rapid) |
| timesaving |
| awake |
| bright(adjective, good, cheerful, quick, flexible) |
| businesslike(adjective, efficient, professional) |
| cursory(fast, quick, rapid, speedy, swift) |
| eager(precise, quick, responsive, early, speedy) |
| electric(hot, quick, velocity, rapid, nimble) |
| energetic(fast, rapid, swift) |
| expeditive(hot, fast, quick, nimble, speedy) |
| furious |
| headlong(prompt, fast, quick, abrupt, rapid) |