breakneck

from WordNet (r) 3.0 (2006)
breakneck
    adj 1: moving at very high speed; "a breakneck pace"
    
from The Collaborative International Dictionary of English v.0.48
Breakneck \Break"neck`\, n.
   1. A fall that breaks the neck.
      [1913 Webster]

   2. A steep place endangering the neck.
      [1913 Webster]
    
from The Collaborative International Dictionary of English v.0.48
Breakneck \Break"neck`\, a.
   Producing danger of a broken neck; as, breakneck speed.
   [1913 Webster]
    
from Moby Thesaurus II by Grady Ward, 1.0
69 Moby Thesaurus words for "breakneck":
      abrupt, accident-prone, agile, bluff, bold, breathless, careless,
      dangerous, daredevil, dashing, desperate, devil-may-care,
      double-quick, eagle-winged, excessive, expeditious, express, fast,
      fleet, flying, furious, galloping, hair-trigger, harum-scarum,
      hasty, headlong, hell for leather, hotheaded, hurried, hustling,
      impetuous, impulsive, light of heel, light-footed, lively, mad,
      mercurial, nimble, nimble-footed, overeager, overenthusiastic,
      overzealous, panting, plunging, precipitant, precipitate,
      precipitous, prompt, quick, quick as lightning, quick as thought,
      rapid, rash, reckless, running, sharp, sheer, slap-bang, slapdash,
      snappy, spanking, speedy, steep, sudden, swift, vertical, wanton,
      wild, winged

    

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