firing vs lighting

firing and lighting both are nouns.

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

As nouns, firing and lighting are synonyms defined as:

Other synonyms of firing include ignition, inflammation, kindling.

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