| hairtrigger(hot, quick, rapid, nimble, speedy) |
| harefooted(quick, speedy, hurried, highpowered, chop-chop) |
| hasty(adjective, hot, quick, rapid, nimble) |
| headlong(quick, speedy, hurried) |
| hereupon(directly, immediately, rapidly, instantly, shortly) |
| hot(quick, rapid, nimble, speedy, brisk) |
| hurried(hot, quick, rapid, nimble, speedy) |
| hypersonic(hot, quick, rapid, nimble, speedy) |
| immediately |
| in a New York minute(expression, idiom, directly, rapidly, instantly) |
| in a flash(expression, idiom, directly, immediately, rapidly) |
| in a minute |
| in a moment |
| instantaneously(directly, immediately, rapidly, instantly) |
| lickety split(expression, hot, quick, nimble, speedy) |
| like a bat out of hell(expression, idiom, hot, quick, nimble) |
| like all get out(expression, idiom, hot, quick, nimble) |
| like crazy(expression, hot, quick, nimble, speedy) |
| like mad(expression, hot, quick, nimble, speedy) |
| nimble(hot, quick, rapid, speedy, brisk) |