fail vs conk

fail is not a noun while conk is a noun.

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

fail (noun)	conk (noun)
	informal term for the nose

fail (verb)	conk (verb)
stop operating or functioning	pass out from weakness, physical or emotional distress due to a loss of blood supply to the brain
deteriorate	pass from physical life and lose all bodily attributes and functions necessary to sustain life
prove insufficient	hit, especially on the head
disappoint, prove undependable to; abandon, forsake	come to a stop
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