repair vs mend

repair and mend both are nouns.

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

As nouns, repair and mend are synonyms defined as:

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

As verbs, repair and mend are synonyms defined as:

repair and mend: restore by replacing a part or putting together what is torn or broken

Other synonyms of repair include bushel, doctor, fix, furbish up, restore, touch on.

repair (noun)	mend (noun)
the act of putting something in working order again	the act of putting something in working order again
a frequently visited place	sewing that repairs a worn or torn hole (especially in a garment)
a formal way of referring to the condition of something

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