go bad vs fail

go bad and fail both are verbs.

Word	Noun	Adjective	Verb	Adverb
go bad	No	No	Yes	No
fail	No	No	Yes	No

As verbs, go bad and fail are synonyms defined as:

Other synonyms of go bad include break, break down, conk out, die, give out, give way, go.

go bad (verb)	fail (verb)
become unfit for consumption or use	stop operating or functioning
stop operating or functioning	deteriorate
	prove insufficient
	disappoint, prove undependable to; abandon, forsake
	become bankrupt or insolvent; fail financially and close
	be unsuccessful
	fail to get a passing grade
	fail to do something; leave something undone
	judge unacceptable
	be unable
	fall short in what is expected