canister shot vs canister

canister shot and canister both are nouns.

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

As nouns, canister shot and canister are synonyms defined as:

canister shot and canister: a metallic cylinder packed with shot and used as ammunition in a firearm

Other synonyms of canister shot include case shot.

canister shot (noun)	canister (noun)
a metallic cylinder packed with shot and used as ammunition in a firearm	metal container for storing dry foods such as tea or flour
	a metallic cylinder packed with shot and used as ammunition in a firearm