redact vs interpolate

redact is a noun but interpolate is not a noun.

Word	Noun	Adjective	Verb	Adverb
redact	Yes	No	Yes	No
interpolate	No	No	Yes	No

As verbs, interpolate is a hyponym of redact; that is, interpolate is a word with a more specific, narrower meaning than redact:

redact: prepare for publication or presentation by correcting, revising, or adapting
interpolate: insert words into texts, often falsifying it thereby

Other hyponyms of redact include alter, falsify, cut up, hack, black out, blank out, copyedit, copyread, subedit, bracket, bracket out.

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

redact (verb)	interpolate (verb)
prepare for publication or presentation by correcting, revising, or adapting	insert words into texts, often falsifying it thereby
formulate in a particular style or language	estimate the value of something based on known values