ad. Quickly, speedily, expeditiously, trippingly, apace, posthaste, rapidly, fleetly, at full speed, with speed, under press of sail or canvas, by forced marches, on eagle's wings, in double-quick time, in seven-league boots, as fast as one's legs will carry one, whip and spur, ventre à terre.

Moby Thesaurus

PDQ, abruptly, agilely, amain, apace, at flank speed, at once, briefly, briskly, by forced marches, cursorily, decisively, directly, double-quick, expeditiously, fast, feverishly, flat-out, fleetingly, flickeringly, flittingly, for a moment, forthwith, full tilt, furiously, hand over fist, hand over hand, hastily, hell for leather, hell-bent, hell-bent for election, helter-skelter, hotfoot, hurriedly, hurry-scurry, immediately, in a flash, in a jiffy, in a trice, in an instant, in double time, in double-quick time, in high, in high gear, in no time, in passing, in seven-league boots, instanter, instantly, lickety-cut, lickety-split, like a shot, like greased lightning, momentarily, nimbly, on the double, on the instant, on the run, on the spot, pell-mell, post, posthaste, precipitately, pretty damned quick, promptly, pronto, quick, quickly, rapidly, readily, right away, right off, shortly, slapdash, smartly, snappily, speedily, spryly, straightaway, straightway, subito, suddenly, summarily, superficially, transiently, trippingly, under forced draft, unexpectedly, whip and spur, with a rush, with all haste, with all speed, with dispatch, with giant strides, with haste, with rapid strides, with speed, without delay, without further delay

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