fixing vs mend

fixing and mend both are nouns.

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

As nouns, fixing and mend are synonyms defined as:

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

fixing (noun)	mend (noun)
the act of putting something in working order again	the act of putting something in working order again
the sterilization of an animal	sewing that repairs a worn or torn hole (especially in a garment)
(histology) the preservation and hardening of a tissue sample to retain as nearly as possible the same relations they had in the living body
restraint that attaches to something or holds something in place

fixing (verb)	mend (verb)
	restore by replacing a part or putting together what is torn or broken
	heal or recover