| punctual(adjective, quick, flexible, timely, swift) |
| quick-fire(adjective, prompt, fast, quick) |
| rapid-fire(adjective, prompt, fast, quick) |
| raring to |
| receptive |
| responsive |
| screaming(adjective, summary, abrupt, showy, unexpected) |
| shaking a leg(expression, adjective, idiom, abrupt, showy) |
| short(adjective, summary, abrupt, rapid, unexpected) |
| short-lived(adjective, summary, abrupt, rapid, unexpected) |
| snappy(adjective, prompt, fast, quick, summary) |
| spanking(adjective, summary, abrupt, rapid, unexpected) |
| speedball(adjective, summary, abrupt, showy, unexpected) |
| spirited |
| sudden(adjective, summary, abrupt, rapid, unexpected) |
| summary(adjective, prompt, fast, quick, rapid) |
| supersonic(adjective, prompt, fast, quick, summary) |
| timely(adjective, quick, flexible, swift) |
| ultrasonic(adjective, prompt, fast, quick) |
| unexpected(adjective, summary, abrupt, rapid, instant) |