| promptly(adjective, adverb, fast, immediately, quickly) |
| immediately(adverb, quick, now, directly, quickly) |
| quickly(adjective, adverb, fast, immediately, rapidly) |
| at once(expression, idiom, adverb, directly, immediately) |
| speedily(adverb, fast, quickly, rapidly) |
| directly(adverb, fast, quickly, rapidly) |
| fast(adjective, adverb, fast, immediately, quickly) |
| swiftly(adverb, fast, quickly, rapidly) |
| rapidly(adverb, fast, quickly) |
| apace(adverb, fast, quickly, rapidly) |
| hastily(adverb, fast, quickly, rapidly) |
| instantaneously(adverb, fast, quickly, rapidly) |
| right away(verb, expression, adverb, phrasal verb, now) |
| without delay(expression, idiom, adverb, directly, immediately) |
| instantly(adverb, early, now, directly, immediately) |
| soon(adjective, adverb, quick, immediate, directly) |
| in nothing flat(expression, idiom, adverb, hot, fast) |
| quick(adjective, adverb, hot, fast, speedy) |
| on the double(expression, idiom, adverb, hot, quick) |
| forthwith(adverb, now, directly, immediately, quickly) |