| immediately(adverb, first, directly, quickly, haste) |
| directly(adverb, fast, quickly, rapidly, instantly) |
| at once(expression, idiom, adverb, directly, immediately) |
| instantly(adverb, first, directly, immediately, quickly) |
| promptly(adverb, fast, quickly, rapidly, instantly) |
| without delay(expression, idiom, adverb, directly, immediately) |
| abruptly(adverb, fast, quickly, rapidly, instantly) |
| quickly(adverb, fast, rapidly, suddenly, earliness) |
| right away(verb, expression, adverb, phrasal verb, directly) |
| pronto(adverb, fast, quickly, rapidly) |
| rapidly(adverb, fast, quickly, pronto) |
| speedily(adverb, fast, quickly, rapidly, earliness) |
| swiftly(adverb, fast, velocity, quickly, rapidly) |
| hastily(adverb, fast, quickly, rapidly, suddenly) |
| instanter(adverb, directly, immediately, quickly, rapidly) |
| suddenly(adverb, suddenly, instantaneity, earliness, inexpectation) |
| outright |
| forthwith(adverb, directly, immediately, quickly, rapidly) |
| momentarily(adverb, transiently) |
| apace(adverb, fast, velocity, quickly, rapidly) |