preparation fire vs firing

preparation fire and firing both are nouns.

Word	Noun	Adjective	Verb	Adverb
preparation fire	Yes	No	No	No
firing	Yes	No	No	No

As nouns, firing is a hypernym of preparation fire; that is, firing is a word with a broader meaning than preparation fire:

Other hypernyms of preparation fire include fire.

preparation fire (noun)	firing (noun)
fire delivered on a target in preparation for an assault	the act of setting something on fire
	the termination of someone's employment (leaving them free to depart)
	the act of discharging a gun
	the act of firing weapons or artillery at an enemy