parting vs departure

parting and departure both are nouns.

Word	Noun	Adjective	Verb	Adverb
parting	Yes	No	No	No
departure	Yes	No	No	No

As nouns, departure is a hypernym of parting; that is, departure is a word with a broader meaning than parting:

Other hypernyms of parting include going, going away, leaving.

parting (noun)	departure (noun)
the act of departing politely	the act of departing
a line of scalp that can be seen when sections of hair are combed in opposite directions	euphemistic expressions for death
	a variation that deviates from the standard or norm