| rapid-fire(prompt, fast, quick) |
| rash(quick, speedy, hurried) |
| ready(prompt, fast, quick) |
| reckless(quick, speedy, hurried) |
| rushed(quick, speedy, hurried) |
| short(quick, speedy, hurried) |
| slambang(quick, speedy, hurried, highpowered, chop-chop) |
| slapdash(quick, speedy, hurried) |
| snappy(adjective, prompt, fast, irritable, quick) |
| speedy(adjective, prompt, fast, irritable, quick) |
| spirited(fast, rapid, swift) |
| sprightly(fast, rapid, swift) |
| spry(fast, rapid, swift) |
| sudden(fast, irritable, quick, abrupt, speedy) |
| summary(prompt, fast, quick) |
| superficial(quick, speedy, hurried) |
| supersonic(prompt, fast, quick) |
| swift(prompt, fast, irritable, quick, abrupt) |
| thoughtless(quick, speedy, hurried) |
| ultrasonic(prompt, fast, quick) |