troubleshoot vs mend

troubleshoot is not a noun while mend is a noun.

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

As verbs, mend is a hypernym of troubleshoot; that is, mend is a word with a broader meaning than troubleshoot:

troubleshoot: solve problems
mend: restore by replacing a part or putting together what is torn or broken

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

troubleshoot (noun)	mend (noun)
	the act of putting something in working order again
	sewing that repairs a worn or torn hole (especially in a garment)

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