Brushes and Undergrowth

Undergrowth and brushes are semantically related. in scrappy bushes topic. In some cases you can use "Undergrowth" instead a noun "Brushes".

Undergrowth noun - The brush (small trees and bushes and ferns etc.) growing beneath taller trees in a wood or forest.

Brushes and undergrowth are semantically related. Sometimes you can replace term "Brushes" with "Undergrowth", this nouns are similar.