rectify vs change by reversal

rectify and change by reversal both are verbs.

Word	Noun	Adjective	Verb	Adverb
rectify	No	No	Yes	No
change by reversal	No	No	Yes	No

As verbs, change by reversal is a hypernym of rectify; that is, change by reversal is a word with a broader meaning than rectify:

Other hypernyms of rectify include reverse, turn.

rectify (verb)	change by reversal (verb)
set straight or right	change to the contrary
make right or correct
reduce to a fine, unmixed, or pure state; separate from extraneous matter or cleanse from impurities
convert into direct current
bring, lead, or force to abandon a wrong or evil course of life, conduct, and adopt a right one
determine the length of