quickly

modif.

1. Rapidly

   speedily, swiftly, fast, briskly, fleetly, flying, with dispatch, scurrying, hurrying, rushing, shooting, bolting, darting, flashing, dashing, suddenly, expeditiously, hastily, hurriedly, in haste, in great haste, in a hurry, by forced marches, at a great rate, without delay, under press of sail, in full sail, against the clock, racing, galloping, loping, sweeping, light-footedly, wingedly, like a bat out of hell*, on the double*, like all forty*, in a flash*, in a jiffy*, to beat the band*, at full blast*, in full sail*, hellbent for leather*, like mad*, at one jump*, by leaps and bounds*, like a house afire*, double-time*, like crazy*, like fury*, full steam ahead*, in high gear*.

   Antonyms slowly*, sluggishly, creepingly.

2. Soon

   at once, instantly, promptly, on the nail*, pronto*; see also immediately, soon 1.