| anon(directly, immediately, rapidly, instantly, shortly) |
| at once(expression, directly, immediately, quickly, rapidly) |
| at short notice(expression, idiom, directly, rapidly, instantly) |
| away(directly, immediately, rapidly, instantly) |
| briskly(adverb, quickly, rapidly, speedily) |
| chop-chop(quickly, rapidly, speedily) |
| directly(immediately, rapidly, instantly) |
| expeditiously(adverb, directly, immediately, quickly, rapidly) |
| flat-out(quickly, rapidly, speedily) |
| fleetly(quickly, rapidly, speedily) |
| forthwith(directly, immediately, rapidly, instantly, shortly) |
| full tilt(expression, quickly, rapidly, speedily) |
| hell-for-leather(adverb, fast) |
| hereupon(directly, immediately, rapidly, instantly, shortly) |
| hurriedly(adverb, quickly, rapidly, speedily) |
| immediately(directly, quickly, rapidly, instantly, speedily) |
| in a New York minute(expression, idiom, directly, rapidly, instantly) |
| in a trice |
| in short order(expression, idiom, quickly, rapidly, speedily) |
| instanter(directly, immediately, rapidly, instantly, shortly) |