fail vs conk out

fail and conk out both are verbs.

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

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

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

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