cannon vs long tom

cannon and long tom both are nouns.

Word	Noun	Adjective	Verb	Adverb
cannon	Yes	No	Yes	No
long tom	Yes	No	No	No

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

Other hyponyms of cannon include basilisk, culverin, harpoon gun, high-angle gun.

cannon (noun)	long tom (noun)
a shot in billiards in which the cue ball contacts one object ball and then the other	a long swivel cannon formerly used by the navy
lower part of the leg extending from the hock to the fetlock in hoofed mammals
a large artillery gun that is usually on wheels
heavy automatic gun fired from an airplane
(Middle Ages) a cylindrical piece of armor plate to protect the arm
heavy gun fired from a tank

cannon (verb)	long tom (verb)
fire a cannon
make a cannon