timber vs greenwood

timber and greenwood both are nouns.

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

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

Other hyponyms of timber include riparian forest, silva, sylva, tree farm.

timber (noun)	greenwood (noun)
a beam made of wood	woodlands in full leaf
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