exit vs going away

exit and going away both are nouns.

Word	Noun	Adjective	Verb	Adverb
exit	Yes	No	Yes	No
going away	Yes	No	No	No

As nouns, going away is a hypernym of exit; that is, going away is a word with a broader meaning than exit:

Other hypernyms of exit include departure, going, leaving.

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

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