breakneck

Main Entry:
breakneck [breyk-nek]
Part of Speech: adjective
Definition: extremely fast
Synonyms: at full tilt, dangerously fast, excessive, flat out, headlong, high-speed, lightning, precipitate, rapid, reckless, speedy, whirlwind
Antonyms: extremely slow
Main Entry: expeditious
Part of Speech: adjective
Definition: immediate, speedy
Synonyms: active, alert, breakneck, brisk, diligent, effective, effectual, efficient, fast, fleet, hasty, instant, nimble, prompt, punctual, quick, rapid, ready, swift
Antonyms: pokey, retarded, slow
Main Entry: fast
Part of Speech: adjective
Definition: speedy
Synonyms: PDQ, accelerated, active, agile, blue streak, breakneck, brisk, chop-chop, dashing, double-time, electric, expeditious, expeditive, flashing, fleet, fleeting, flying, hairtrigger, hasty, hot, hurried, hypersonic, in a jiffy, in nothing flat, lickety split, like a bat out of hell, like all get out, like crazy, like mad, nimble, on the double, posthaste, presto, pronto, quick, racing, rapid, ready, screamin', snap*, snappy, speedball, supersonic, swift, velocious, winged
Antonyms: plodding, slow, tardy, unhurried
Main Entry: fleet
Part of Speech: adjective
Definition: quick in movement
Synonyms: agile, barreling, breakneck, brisk, expeditious, expeditive, fast, flying, hasty, in nothing flat, like greased lightning, lively, mercurial, meteoric, nimble, nimble-footed, on the double, rapid, screaming, speedball, speedy, swift, winged
Antonyms: clumsy, slow
Main Entry: foolhardy
Part of Speech: adjective
Definition: impetuous, rash
Synonyms: adventuresome, adventurous, audacious, bold, breakneck, daredevil, daring, devil-may-care, harebrained, headstrong, imprudent, incautious, irresponsible, madcap, off deep end, out on limb, precipitate, reckless, temerarious, venturesome, venturous, wide open
Antonyms: careful, cautious, discreet, thoughtful
Main Entry: hasty
Part of Speech: adjective
Definition: speedy; without much thought
Synonyms: PDQ, abrupt, agile, brash, breakneck, brief, brisk, careless, chop-chop, cursory, eager, expeditious, fast, fiery, fleet, fleeting, foolhardy, harefooted, headlong, heedless, hurried, ill-advised, impatient, impetuous, impulsive, incautious, inconsiderate, madcap, on the double, passing, perfunctory, precipitate, prompt, pronto, quick, quickened, quickie, rapid, rash, reckless, rushed, short, slambang, slapdash, snappy, sudden, superficial, swift, thoughtless, urgent
Antonyms: delayed, lazy, lingering, loitering, slow
Main Entry: headlong
Part of Speech: adjective
Definition: dangerous, reckless
Synonyms: abrupt, brash, breakneck, daredevil, daring, foolhardy, hasty, hurried, impetuous, impulsive, inconsiderate, precipitant, precipitate, rash, rough, rushing, sudden, tempestuous, thoughtless
Antonyms: careful, cautious, thoughtfully, wary
Main Entry: hurried
Part of Speech: adjective
Definition: quick, rushed
Synonyms: abrupt, breakneck, brief, cursory, fast, hasty, headlong, hectic, impetuous, perfunctory, precipitant, precipitate, precipitous, rushing, short, slapdash, speedy, subitaneous, sudden, superficial, swift
Antonyms: easily, leisurely, slow, unhurried, unrushed
Main Entry: posthaste
Part of Speech: adjective, adverb
Definition: fast
Synonyms: at once, breakneck, directly, double-quick, expeditious, flat-out, fleet, fleetly, full tilt, hastily, hasty, headlong, lickety-split, pell-mell, promptly, pronto, quick, quickly, rapid, rapidly, speedily, speedy, straightaway, swift, swiftly
Antonyms: eventually, slow, slowly
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