| astir(adjective, bright, energetic, active, vigorous) |
| brainy(adjective, smart, intelligent, clever) |
| brilliant(keen, smart, bright, intelligent, competent) |
| bustling(adjective, keen, bright, intense, energetic) |
| busy(adjective, keen, intense, energetic, lively) |
| capable(adjective, keen, smart, intelligent, competent) |
| cheerful(adjective, bright, energetic, lively, active) |
| chipper(adjective, keen, intense, energetic, lively) |
| competent(adjective, capable, skillful, proficient) |
| crack(adjective, skillful, handy, adroit, nifty) |
| crafty(adjective, skillful) |
| efficient(adjective, keen, smart, intelligent, competent) |
| expeditive(hot, fast, quick, nimble, speedy) |
| expert(adjective, keen, smart, intelligent, competent) |
| fast learner |
| fit(adjective, lithe, sporty) |
| galloping |
| genius(adjective, skillful) |
| handy(adjective, quick, skillful, sprightly, adroit) |
| headlong(prompt, fast, quick, rapid, speedy) |