List of swiftly synonyms and swiftly related words.
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