gun vs cannon

gun and cannon both are nouns.

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

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

gun: a weapon that discharges a missile at high velocity (especially from a metal tube or barrel)
cannon: heavy automatic gun fired from an airplane

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

Other hyponyms of gun include field artillery, field gun, four-pounder, depth charge thrower.

gun (noun)	cannon (noun)
the discharge of a firearm as signal or as a salute in military ceremonies	a shot in billiards in which the cue ball contacts one object ball and then the other
a weapon that discharges a missile at high velocity (especially from a metal tube or barrel)	lower part of the leg extending from the hock to the fetlock in hoofed mammals
large but transportable armament	a large artillery gun that is usually on wheels
a hand-operated pump that resembles a pistol; forces grease into parts of a machine	heavy automatic gun fired from an airplane
a pedal that controls the throttle valve	(Middle Ages) a cylindrical piece of armor plate to protect the arm
a professional killer who uses a gun	heavy gun fired from a tank
a person who shoots a gun (as regards their ability)

gun (verb)	cannon (verb)
shoot with a gun	fire a cannon
	make a cannon