aluminium foil vs aluminum foil

aluminium foil and aluminum foil both are nouns.

Word	Noun	Adjective	Verb	Adverb
aluminium foil	Yes	No	No	No
aluminum foil	Yes	No	No	No

As nouns, aluminium foil and aluminum foil are synonyms defined as:

Other synonyms of aluminium foil include tin foil.

aluminium foil (noun)	aluminum foil (noun)
foil made of aluminum	foil made of aluminum