shot vs firing

shot and firing both are nouns.

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

As nouns, firing is a hyponym of shot; that is, firing is a word with a more specific, narrower meaning than shot:

Other hyponyms of shot include shoot, countershot, discharge, firing off, gunfire, gunshot, headshot, shellfire, potshot.

shot (noun)	firing (noun)
the act of firing a projectile	the act of setting something on fire
the act of putting a liquid into the body by means of a syringe	the termination of someone's employment (leaving them free to depart)
informal words for any attempt or effort	the act of discharging a gun
(sports) the act of swinging or striking at a ball with a club or racket or bat or cue or hand	the act of firing weapons or artillery at an enemy
the launching of a missile or spacecraft to a specified destination
an attempt to score in a game
a blow hard enough to cause injury
throwing the basketball toward the hoop
a solid missile discharged from a firearm
an informal photograph; usually made with a small hand-held camera
an explosive charge used in blasting
sports equipment consisting of a heavy metal ball used in the shot put
an estimate based on little or no information
an aggressive remark directed at a person like a missile and intended to have a telling effect
a consecutive series of pictures that constitutes a unit of action in a film
a person who shoots (usually with respect to their ability to shoot)
a small drink of liquor
a chance to do something

shot (adjective)	firing (adjective)
varying in color when seen in different lights or from different angles