stringer vs timber

stringer and timber both are nouns.

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

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

stringer (noun)	timber (noun)
a long horizontal timber to connect uprights	a beam made of wood
brace consisting of a longitudinal member to strengthen a fuselage or hull	a post made of wood
a worker who strings	(music) the distinctive property of a complex sound (a voice or noise or musical sound)
a member of a squad on a team	land that is covered with trees and shrubs
	the wood of trees cut and prepared for use as building material