Use 'brushwood' when discussing natural environments or outdoor activities such as camping and hiking.

Natural Contexts

'Brushwood' is often used to describe materials for building rudimentary shelters or huts in survival situations.

Temporary Structures

After pruning or clearing vegetation, the remains are referred to as 'brushwood', typically to be disposed of or burned.

Gardening Cleanup

 the trees and in the comfortable safety of a brushwood billy baby squirrels are finally born initially they're blind and helpless but the tours vital equipment for a treetop