Source : Webster's Revised Unabridged Dictionary (1913)

Scranch \Scranch\, v. t. [imp. & p. p. {Scranched}; p. pr. & vb.
   n. {Scranching}.] [Cf. D. schransen to eat greedily, G.
   schranzen. Cf. {Crunch}, {Scrunch}.]
   To grind with the teeth, and with a crackling sound; to
   craunch. [Prov. Eng. & Colloq. U. S.]

Source : WordNet®

scranch
     v : make crunching noises; "his shoes were crunching on the
         gravel" [syn: {crunch}, {scraunch}, {crackle}]