exit vs give-up the ghost

exit is a noun but give-up the ghost is not a noun.

Word	Noun	Adjective	Verb	Adverb
exit	Yes	No	Yes	No
give-up the ghost	No	No	Yes	No

As verbs, exit and give-up the ghost are synonyms defined as:

exit and give-up the ghost: pass from physical life and lose all bodily attributes and functions necessary to sustain life

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

exit (verb)	give-up the ghost (verb)
pass from physical life and lose all bodily attributes and functions necessary to sustain life	pass from physical life and lose all bodily attributes and functions necessary to sustain life
lose the lead
move out of or depart from