The difference between Forest and Timber

Forest as a noun:

A dense uncultivated tract of trees and undergrowth, larger than woods.

Forest as a noun:

Any dense collection or amount.

Forest as a noun (historical):

A defined area of land set aside in England as royal hunting ground or for other privileged use; all such areas.

Forest as a noun (graph theory):

A graph with no cycles; i.e., a graph made up of trees.

Forest as a noun (computing, Microsoft Windows):

A group of domains that are managed as a unit.

Forest as a noun:

The colour forest green.

Forest as a verb (transitive):

To cover an area with trees.

Timber as a noun (uncountable):

Trees in a forest regarded as a source of wood.

Timber as a noun (outside, North America, uncountable):

Wood that has been pre-cut and is ready for use in construction.

Timber as a noun (countable):

A heavy wooden beam, generally a whole log that has been squared off and used to provide heavy support for something such as a roof.

Timber as a noun:

Material for any structure.

Timber as a noun (firearms, informal):

The wooden stock of a rifle or shotgun.

Timber as a noun (archaic):

A certain quantity of fur skins (as of martens, ermines, sables, etc.) packed between boards; in some cases forty skins, in others one hundred and twenty. Also timmer, timbre.

Timber as a verb (transitive):

To fit with timbers.

Timber as a verb (transitive, obsolete):

To construct, frame, build.

Timber as a verb (falconry, intransitive):

To light or land on a tree.

Timber as a verb (obsolete):

To make a nest.

Timber as a verb (transitive):

To surmount as a timber does.

Timber as a noun: