timber - trees in a forest regarded as a source of wood. / material wood, (UK) timber, (US) lumber - wood that has been pre-cut and is ready for use in construction.

clamp

to use / to employ / to make use of, to apply / to spend

fixation, fixedness

to fix, to settle

use one thing for many purposes / work someone hard

to use one's head

fixed-line telephone; landline

fixed length (e.g. block)

fixed media