The Collaborative International Dictionary of English v.0.48:

Speedy \Speed"y\ (-[y^]), a. [Compar. Speedier; superl.
   Speediest.] [AS. sp[=e]dyg.]
   Not dilatory or slow; quick; swift; nimble; hasty; rapid in
   motion or performance; as, a speedy flight; on speedy foot.
   [1913 Webster]

         I will wish her speedy strength.         --Shak.
   [1913 Webster]

         Darts, which not the good could shun,
         The speedy ould outfly.                  --Dryden.
   [1913 Webster]

WordNet (r) 3.0 (2006):

speedy
    adj 1: characterized by speed; moving with or capable of moving
           with high speed; "a rapid movement"; "a speedy car"; "a
           speedy errand boy" [syn: rapid, speedy]
    2: accomplished rapidly and without delay; "was quick to make
       friends"; "his quick reaction prevented an accident"; "hoped
       for a speedy resolution of the problem"; "a speedy recovery";
       "he has a right to a speedy trial" [syn: quick, speedy]

Moby Thesaurus II by Grady Ward, 1.0:

87 Moby Thesaurus words for "speedy":
   abrupt, agile, alacritous, alert, apt, breakneck, brief, brisk,
   cometary, cursory, dashing, decisive, dispatchful, double-quick,
   eagle-winged, electrifying, expeditious, express, fast, festinate,
   feverish, flashing, fleet, flickering, flying, furious, galloping,
   hair-trigger, hasty, headlong, hurried, hustling, immediate,
   impetuous, impulsive, instant, instantaneous, last-minute,
   light of heel, light-footed, lively, mercurial, meteoric,
   nerve-shattering, nimble, nimble-footed, on the spot, passing,
   precipitant, precipitate, precipitous, prompt, punctual, quick,
   quick as lightning, quick as thought, raking, rapid, ready,
   reckless, running, sharp, shocking, short, short and sweet,
   short-term, short-termed, slap-bang, slapdash, smart, snap, snappy,
   spanking, spry, startling, sudden, summary, superficial,
   surprising, swift, unanticipated, unexpected, unforeseen,
   unlooked-for, unpredicted, urgent, winged