timber vs coulisse

timber and coulisse both are nouns.

Word	Noun	Adjective	Verb	Adverb
timber	Yes	No	No	No
coulisse	Yes	No	No	No

As nouns, coulisse is a hyponym of timber; that is, coulisse is a word with a more specific, narrower meaning than timber:

Other hyponyms of timber include sternpost, stringer, two-by-four.

timber (noun)	coulisse (noun)
a beam made of wood	a timber member grooved to take a sliding panel
a post made of wood	a flat situated in the wings
(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