amend vs rectify

amend and rectify both are verbs.

Word	Noun	Adjective	Verb	Adverb
amend	No	No	Yes	No
rectify	No	No	Yes	No

As verbs, amend and rectify are synonyms defined as:

Other synonyms of amend include remediate, remedy, repair.

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

Other hypernyms of amend include correct, right.

amend (verb)	rectify (verb)
to make better	set straight or right
set straight or right	make right or correct
make amendments to	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