repair vs mending

repair and mending both are nouns.

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

As nouns, repair and mending are synonyms defined as:

Other synonyms of repair include fix, fixing, fixture, mend, reparation.

repair (noun)	mending (noun)
the act of putting something in working order again	the act of putting something in working order again
a frequently visited place	garments that must be repaired
a formal way of referring to the condition of something

repair (verb)	mending (verb)
give new life or energy to
restore by replacing a part or putting together what is torn or broken
set straight or right
move, travel, or proceed toward some place
make amends for; pay compensation for