lighting vs firing

lighting and firing both are nouns.

Word	Noun	Adjective	Verb	Adverb
lighting	Yes	No	No	No
firing	Yes	No	No	No

As nouns, lighting and firing are synonyms defined as:

Other synonyms of lighting include ignition, inflammation, kindling.

lighting (noun)	firing (noun)
the act of setting something on fire	the act of setting something on fire
the craft of providing artificial light	the termination of someone's employment (leaving them free to depart)
apparatus for supplying artificial light effects for the stage or a film	the act of discharging a gun
having abundant light or illumination	the act of firing weapons or artillery at an enemy