posthaste

• POS: Noun, Adverb
• HYPHEN: post=haste

CIDE DICTIONARY

posthaste, n. 

 Haste or speed in traveling, like that of a post or courier.  Shak.  [1913 Webster]

posthaste, adv. 

 With speed or expedition; as, he traveled posthaste; to send posthaste.  Shak.  [1913 Webster]

THESAURUS

posthaste

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 for leather, hell-bent, hell-bent for election, in double time, in double-quick 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

ROGET THESAURUS

posthaste

Haste

N haste, urgency, despatch, dispatch, acceleration, spurt, spirt, forced march, rush, dash, speed, velocity, precipitancy, precipitation, precipitousness, impetuosity, brusquerie, hurry, drive, scramble, bustle, fuss, fidget, flurry, flutter, splutter, hasty, hurried, brusque, scrambling, cursory, precipitate, headlong, furious, boisterous, impetuous, hotheaded, feverish, fussy, pushing, in haste, in a hurry, in hot haste, in all haste, breathless, pressed for time, hard pressed, urgent, with haste, with all haste, with breathless speed, in haste, apace, amain, all at once, at short notice, immediately, posthaste, by cable, by express, by telegraph, by forced marches, hastily, precipitately, helter-skelter, hurry-skurry, holus-bolus, slapdash, slap-bang, full-tilt, full drive, heels over head, head and shoulders, headlong, a corps perdu, by fits and starts, by spurts, hop skip and jump, sauve qui peut, every man for himself, devil take the hindmost, no time to be lost, no sooner said than done, a word and a blow, haste makes waste, maggiore fretta minore atto, ohne Hast aber ohne Rast stand not upon the order, swift, swift, you dragons of the night.

Velocity

N velocity, speed, celerity, swiftness, rapidity, eagle speed, expedition, pernicity, acceleration, haste, spurt, rush, dash, race, steeple chase, smart rate, lively rate, swift rate, rattling rate, spanking rate, strapping rate, smart pace, lively pace, swift pace, rattling pace, spanking pace, strapping pace, round pace, flying, flight, lightning, greased lightning, light, electricity, wind, cannon ball, rocket, arrow, dart, hydrargyrum, quicksilver, telegraph, express train, torrent, eagle, antelope, courser, race horse, gazelle, greyhound, hare, doe, squirrel, camel bird, chickaree, chipmunk, hackee, ostrich, scorcher, Mercury, Ariel, Camilla, Harlequin, log, log line, speedometer, odometer, tachometer, strobe, radar speed detector, radar trap, air speed gauge, wind sock, wind speed meter, pedometer, fast, speedy, swift, rapid, quick, fleet, aliped, nimble, agile, expeditious, express, active, flying, galloping, light footed, nimble footed, winged, eagle winged, mercurial, electric, telegraphic, light-legged, light of heel, swift as an arrow, quick as lightning, quick as a thought, swiftly, with speed, apace, at a great rate, at full speed, at railway speed, full drive, full gallop, posthaste, in full sail, tantivy, trippingly, instantaneously, under press of sail, under press of canvas, under press of sail and steam, velis et remis, on eagle's wing, in double quick time, with rapid strides, with giant strides, a pas de geant, in seven league boots, whip and spur, ventre a terre, as fast as one's legs will carry one, as fast as one's heels will carry one, as fast as one can lay legs to the ground, at the top of one's speed, by leaps and bounds, with haste, vires acquirit eundo, I'll put a girdle about the earth in forty minutes, swifter than arrow from the Tartar's bow, go like a bat out of hell, tempus fugit.