Source : Webster's Revised Unabridged Dictionary (1913)

Brushwood \Brush"wood\, n.
   1. Brush; a thicket or coppice of small trees and shrubs.

   2. Small branches of trees cut off.

Source : WordNet®

brushwood
     n 1: the wood from bushes or small branches; "they built a fire
          of brushwood"
     2: a dense growth of bushes [syn: {brush}, {coppice}, {copse},
        {thicket}]