| posthaste(adjective, adverb, fast, quick, quickly) |
| fast(adverb, quickly, rapidly, soon, swiftly) |
| pronto(adverb, fast, quickly, rapidly, soon) |
| quickly(adverb, fast, rapidly, soon, swiftly) |
| apace(adverb, fast, quick, quickly, rapidly) |
| expeditiously(quick, quickly, rapidly, soon, swiftly) |
| hastily(quick, quickly, rapidly, speedily) |
| rapidly(quick, quickly, heartily, readily, sincerely) |
| speedily(quick, quickly, earnestly, rapidly, promptly) |
| swiftly(quickly, rapidly, soon, snappily, speedily) |
| actively(earnestly, promptly, enthusiastically, energetically, anxiously) |
| briskly(immediately, quickly, rapidly, enthusiastically, energetically) |
| energetically(earnestly, promptly, enthusiastically, anxiously, aggressively) |
| flat-out(quick, quickly, rapidly, speedily) |
| fleetly(adverb, quick, quickly, rapidly, snappily) |
| hurriedly(quick, quickly, rapidly, soon, swiftly) |
| in haste(expression, immediately, quickly, rapidly, snappily) |
| in nothing flat(expression, idiom, quickly, rapidly, soon) |
| in short order(expression, idiom, quickly, rapidly, soon) |
| lickety-split(adverb, fast) |