| speedily(adverb, fast, quickly, rapidly, hastily) |
| quickly(adverb, fast, quickly, rapidly, hastily) |
| rapidly(adverb, fast, quickly, hastily, pronto) |
| promptly(adverb, fast, quickly, rapidly, pronto) |
| expeditiously(adverb, directly, immediately, quickly, rapidly) |
| hastily(adverb, fast, quickly, rapidly, hastily) |
| fast(adjective, adverb, quickly, rapidly, pronto) |
| immediately(adverb, directly, quickly, rapidly, instantly) |
| apace(adverb, fast, velocity, quickly, rapidly) |
| briskly(adverb, fast, quickly, rapidly, hastily) |
| hurriedly(adverb, fast, quickly, rapidly, hastily) |
| pronto(adverb, fast, quickly, rapidly) |
| abruptly(adverb, fast, quickly, rapidly, hastily) |
| lickety-split(adjective, adverb, fast) |
| at once(expression, idiom, adverb, directly, immediately) |
| instantly(adverb, punctually) |
| without delay(expression, idiom, adverb, directly, immediately) |
| directly(adverb, fast, quickly, rapidly, pronto) |
| like a shot(expression, idiom, adverb, fast, quickly) |
| instantaneously(adverb, fast, velocity, quickly, rapidly) |