canister vs cannister

canister and cannister both are nouns.

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

As nouns, canister and cannister are synonyms defined as:

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

Other synonyms of canister include tin.

canister (noun)	cannister (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