The Collaborative International Dictionary of English v.0.48:

Scrunch \Scrunch\, v. t. & v. i. [Cf. Scranch, Crunch.]
   To scranch; to crunch. --Dickens.
   [1913 Webster]

WordNet (r) 3.0 (2006):

scrunch
    n 1: a crunching noise
    v 1: make a noise typical of an engine lacking lubricants [syn:
         crump, thud, scrunch]
    2: sit on one's heels; "In some cultures, the women give birth
       while squatting"; "The children hunkered down to protect
       themselves from the sandstorm" [syn: squat, crouch,
       scrunch, scrunch up, hunker, hunker down]
    3: make wrinkles or creases on a smooth surface; make a pressed,
       folded or wrinkled line in; "The dress got wrinkled"; "crease
       the paper like this to make a crane" [syn: wrinkle,
       ruckle, crease, crinkle, scrunch, scrunch up,
       crisp]

Moby Thesaurus II by Grady Ward, 1.0:

76 Moby Thesaurus words for "scrunch":
   abrade, atomize, beat, belch, blare, blat, bray, brecciate, burr,
   buzz, cackle, caw, champ, chaw, chew, chirr, chomp, chump, clang,
   clangor, clank, clash, comminute, contriturate, craunch, crimp,
   crimple, crinkle, croak, crumb, crumble, crump, crunch, crush,
   disintegrate, flour, fragment, grain, granulate, granulize, grate,
   grind, grind to powder, groan, growl, grumble, jangle, jar,
   levigate, mash, masticate, mill, munch, pestle, pound, powder,
   pulverize, rasp, reduce to powder, rimple, ruckle, ruminate,
   rumple, scranch, scrape, scratch, screw, shard, shred, smash,
   snarl, snore, squash, triturate, twang, wrinkle