case shot vs canister shot

case shot and canister shot both are nouns.

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

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

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

Other synonyms of case shot include canister.

case shot (noun)	canister shot (noun)
a metallic cylinder packed with shot and used as ammunition in a firearm	a metallic cylinder packed with shot and used as ammunition in a firearm