amain apace at flank speed bent on dead set on decided upon determined upon double-quick expeditiously fast fixed upon hand over fist hand over hand hastily hell for leather hell-bent for election hell-bent on in double time in double-quick time in high in high gear in seven-league boots intent upon lickety-cut lickety-split on the double post posthaste promptly quick quickly rapidly resolved upon set on settled upon snappily sot on speedily swiftly trippingly under forced draft whip and spur with all haste with giant strides with rapid strides with speed