take back vs disown

take back and disown both are verbs.

Word	Noun	Adjective	Verb	Adverb
take back	No	No	Yes	No
disown	No	No	Yes	No

As verbs, disown is a hypernym of take back; that is, disown is a word with a broader meaning than take back:

Other hypernyms of take back include renounce, repudiate.

take back (verb)	disown (verb)
cause someone to remember the past	cast off
take back what one has said	prevent deliberately (as by making a will) from inheriting
move text to the previous line; in printing
bring back to the point of departure
regain possession of something
resume a relationship with someone after an interruption, as in a wife taking back her husband