authorship vs redaction

authorship and redaction both are nouns.

Word	Noun	Adjective	Verb	Adverb
authorship	Yes	No	No	No
redaction	Yes	No	No	No

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

authorship (noun)	redaction (noun)
the act of creating written works	the act of putting something in writing
the act of initiating a new idea or theory or writing	putting something (as a literary work or a legislative bill) into acceptable form