exit vs enter

exit is a noun but enter is not a noun.

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

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

exit (verb)	enter (verb)
pass from physical life and lose all bodily attributes and functions necessary to sustain life	set out on (an enterprise or subject of study)
lose the lead	make a record of; set down in permanent form
move out of or depart from	become a participant; be involved in
	put or introduce into something
	come on stage
	to come or go into
	take on duties or office
	register formally as a participant or member
	be or play a part of or in