action vs gun

action and gun both are nouns.

Word	Noun	Adjective	Verb	Adverb
action	Yes	No	Yes	No
gun	Yes	No	Yes	No

action (noun)	gun (noun)
the most important or interesting work or activity in a specific area or field	the discharge of a firearm as signal or as a salute in military ceremonies
a judicial proceeding brought by one party against another; one party prosecutes another for a wrong done or for protection of a right or for prevention of a wrong	a weapon that discharges a missile at high velocity (especially from a metal tube or barrel)
something done (usually as opposed to something said)	large but transportable armament
a military engagement	a hand-operated pump that resembles a pistol; forces grease into parts of a machine
an act by a government body or supranational organization	a pedal that controls the throttle valve
the operating part that transmits power to a mechanism	a professional killer who uses a gun
In firearms terminology, the mechanism that handles the ammunition (loads, locks, fires, and extracts the cartridges).	a person who shoots a gun (as regards their ability)
the trait of being active and energetic and forceful
the series of events that form a plot
a process existing in or produced by nature (rather than by the intent of human beings)
the state of being active

action (verb)	gun (verb)
put in effect	shoot with a gun
institute legal proceedings against; file a suit against