| pronto(adjective, adverb, directly, immediately, rapidly) |
| forthwith(adverb, directly, immediately, rapidly, instantly) |
| without delay(expression, adjective, adverb, directly, immediately) |
| at once(expression, adjective, adverb, directly, immediately) |
| immediately |
| instantaneously(adverb, directly, immediately, rapidly, instantly) |
| directly(adverb, immediately, rapidly, instantly) |
| now(adjective, adverb, directly, immediately, rapidly) |
| promptly(adverb, directly, immediately, rapidly, instantly) |
| right away(expression, adjective, adverb, directly, immediately) |
| soon(directly, immediately, rapidly, instantly) |
| PDQ(directly, immediately, rapidly, instantly) |
| hereupon(directly, immediately, rapidly, instantly) |
| in a jiffy(expression, idiom, adverb, directly, immediately) |
| in a wink(adjective, adverb, immediately) |
| in no time(expression, idiom) |
| instanter(adverb, directly, immediately, rapidly, instantly) |
| instantly(adverb, directly, immediately, rapidly) |
| on the dot(expression, idiom, directly, immediately, rapidly) |
| quickly |