black out vs redact

black out is not a noun while redact is a noun.

Word	Noun	Adjective	Verb	Adverb
black out	No	No	Yes	No
redact	Yes	No	Yes	No

As verbs, redact is a hypernym of black out; that is, redact is a word with a broader meaning than black out:

black out: suppress by censorship as for political reasons
redact: prepare for publication or presentation by correcting, revising, or adapting

Other hypernyms of black out include edit.

black out (noun)	redact (noun)
	someone who puts text into appropriate form for publication

black out (verb)	redact (verb)
lose consciousness due to a sudden trauma, for example	prepare for publication or presentation by correcting, revising, or adapting
suppress by censorship as for political reasons	formulate in a particular style or language
darken completely