exit vs fail

exit is a noun but fail is not a noun.

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

exit (noun)	fail (noun)
the act of going out
an opening that permits escape or release
euphemistic expressions for death

exit (verb)	fail (verb)
pass from physical life and lose all bodily attributes and functions necessary to sustain life	stop operating or functioning
lose the lead	deteriorate
move out of or depart from	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