coloration vs timbre

coloration and timbre both are nouns.

Word	Noun	Adjective	Verb	Adverb
coloration	Yes	No	No	No
timbre	Yes	No	No	No

As nouns, timbre is a hypernym of coloration; that is, timbre is a word with a broader meaning than coloration:

coloration: the timbre of a musical sound
timbre: (music) the distinctive property of a complex sound (a voice or noise or musical sound)

Other hypernyms of coloration include quality, timber, tone.

coloration (noun)	timbre (noun)
choice and use of colors (as by an artist)	(music) the distinctive property of a complex sound (a voice or noise or musical sound)
appearance with regard to color
the timbre of a musical sound