voicing vs readjustment

voicing and readjustment both are nouns.

Word	Noun	Adjective	Verb	Adverb
voicing	Yes	No	No	No
readjustment	Yes	No	No	No

As nouns, readjustment is a hypernym of voicing; that is, readjustment is a word with a broader meaning than voicing:

voicing: the act of adjusting an organ pipe (or wind instrument) so that it conforms to the standards of tone and pitch and color
readjustment: the act of adjusting something to match a standard

Other hypernyms of voicing include adjustment, registration.

voicing (noun)	readjustment (noun)
the act of adjusting an organ pipe (or wind instrument) so that it conforms to the standards of tone and pitch and color	the act of adjusting again (to changed circumstances)
	the act of adjusting something to match a standard