conk out vs fail

conk out and fail both are verbs.

Word	Noun	Adjective	Verb	Adverb
conk out	No	No	Yes	No
fail	No	No	Yes	No

As verbs, conk out and fail are synonyms defined as:

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

conk out (verb)	fail (verb)
use up all one's strength and energy and stop working	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