amain, apace, at flank speed, breakneck, by airmail, by cable, by express, by return mail, by telegraph, double-quick, expeditious, expeditiously, express, fast, flat-out, fleet, full tilt, hand over fist, hand over hand, hastily, hasty, hell-bent, hell-bent for election, hell for leather, in double-quick time, in double time, in high, in high gear, in posthaste, in seven-league boots, lickety-cut, lickety-split, on the double, post, promptly, quick, quickly, rapid, rapidly, snappily, speedily, speedy, swift, swiftly, trippingly, under forced draft, whip and spur, with all haste, with giant strides, with rapid strides, with speed