forest vs timber

forest and timber both are nouns.

As nouns, forest and timber are synonyms defined as:

Other synonyms of forest include woodland, timberland.

forest (noun)	timber (noun)
the trees and other plants in a large densely wooded area	the wood of trees cut and prepared for use as building material
land that is covered with trees and shrubs	a beam made of wood
	a post made of wood
	land that is covered with trees and shrubs
	(music) the distinctive property of a complex sound (a voice or noise or musical sound)

forest (verb)	timber (verb)
establish a forest on previously unforested land