| at once(expression, adverb, directly, immediately, rapidly) |
| forthwith(adverb, directly, immediately, rapidly, instantly) |
| now(adverb, directly, immediately, rapidly, instantly) |
| pronto(adverb, directly, immediately, rapidly, instantly) |
| without delay(expression, adverb, directly, immediately, rapidly) |
| right away(expression, directly, immediately, rapidly, instantly) |
| PDQ(directly, immediately, rapidly, instantly, shortly) |
| all at once(expression, idiom) |
| all together |
| anon(directly, immediately, rapidly, instantly, shortly) |
| at short notice(expression, idiom, directly, rapidly, instantly) |
| away(directly, immediately, rapidly, instantly) |
| directly(adverb, immediately, rapidly, instantly) |
| double-time(directly, immediately, rapidly, instantly, shortly) |
| hereupon(directly, immediately, rapidly, instantly, shortly) |
| in a New York minute(expression, idiom, directly, rapidly, instantly) |
| in a flash(expression, directly, immediately, rapidly, instantly) |
| in a jiffy(expression, idiom, directly, immediately, rapidly) |
| in nothing flat(expression, idiom, directly, rapidly, instantly) |
| instantaneously(adverb, directly, immediately, rapidly, instantly) |