cannister vs canister

cannister and canister both are nouns.

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

As nouns, cannister and canister are synonyms defined as:

cannister and canister: metal container for storing dry foods such as tea or flour

Other synonyms of cannister include tin.

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