repair vs rectify

repair is a noun but rectify is not a noun.

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

As verbs, repair and rectify are synonyms defined as:

Other synonyms of repair include amend, remediate, remedy.

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

Other hypernyms of repair include correct, right.

repair (noun)	rectify (noun)
the act of putting something in working order again
a frequently visited place
a formal way of referring to the condition of something

repair (verb)	rectify (verb)
give new life or energy to	set straight or right
restore by replacing a part or putting together what is torn or broken	make right or correct
set straight or right	reduce to a fine, unmixed, or pure state; separate from extraneous matter or cleanse from impurities
move, travel, or proceed toward some place	convert into direct current
make amends for; pay compensation for	bring, lead, or force to abandon a wrong or evil course of life, conduct, and adopt a right one
	determine the length of