Synonyms and related words :
PDQ, amain, at flank speed, at once, by forced marches, cursorily, decisively, directly, double-quick, expeditiously, fast, feverishly, flat-out, forthwith, 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 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, on the double, on the instant, on the run, on the spot, pell-mell, post, posthaste, pretty damned quick, promptly, pronto, quick, quickly, rapidly, right away, right off, slapdash, smartly, snappily, speedily, straightaway, straightway, subito, summarily, superficially, swiftly, trippingly, under forced draft, 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