tree farm vs timber

tree farm and timber both are nouns.

Word	Noun	Adjective	Verb	Adverb
tree farm	Yes	No	No	No
timber	Yes	No	No	No

As nouns, timber is a hypernym of tree farm; that is, timber is a word with a broader meaning than tree farm:

tree farm: a forest (or part of a forest) where trees are grown for commercial use
timber: land that is covered with trees and shrubs

Other hypernyms of tree farm include forest, timberland, woodland.

tree farm (noun)	timber (noun)
a forest (or part of a forest) where trees are grown for commercial use	a beam made of wood
	a post made of wood
	(music) the distinctive property of a complex sound (a voice or noise or musical sound)
	land that is covered with trees and shrubs
	the wood of trees cut and prepared for use as building material