WordNet (r) 3.0 (2006):

run away
    v 1: flee; take to one's heels; cut and run; "If you see this
         man, run!"; "The burglars escaped before the police showed
         up" [syn: scat, run, scarper, turn tail, lam,
         run away, hightail it, bunk, head for the hills,
         take to the woods, escape, fly the coop, break
         away]
    2: escape from the control of; "Industry is running away with us
       all"

Moby Thesaurus II by Grady Ward, 1.0:

37 Moby Thesaurus words for "run away":
   abscond, absquatulate, beat a retreat, bolt, clear out,
   cut and run, cut out, decamp, depart, desert, elope, flee, fly,
   fugitate, go AWOL, hightail, jump, jump bail, levant, make off,
   make tracks, run, run along, run away from, run away with,
   run for it, run off, show the heels, skedaddle, skip, skip out,
   slip the cable, take French leave, take flight, take to flight,
   take wing, turn tail