| PDQ(hot, quick, rapid, nimble, speedy) |
| abrupt(fast, quick, rapid, speedy, swift) |
| airy(adjective, light, slight, easy, thin) |
| animate(adjective, bright, energetic, lively, active) |
| atmospheric(adjective, light, slight, easy, thin) |
| attentive |
| au fait(expression, keen, smart, intelligent, competent) |
| awake |
| being able |
| blithe(adjective, energetic, lively, active, vigorous) |
| blue streak(expression, hot, quick, nimble, speedy) |
| bouncy(adjective, energetic, lively, active, vigorous) |
| breezy |
| brief(fast, quick, rapid, speedy, swift) |
| buzzing(adjective, bright, energetic, active, vigorous) |
| canny(adjective, smart, bright, intelligent, clever) |
| catty |
| cheery |
| chirpy(adjective, energetic, lively, active, vigorous) |
| chop-chop(hot, quick, rapid, nimble, speedy) |