aluminium oxide vs alumina

aluminium oxide and alumina both are nouns.

Word	Noun	Adjective	Verb	Adverb
aluminium oxide	Yes	No	No	No
alumina	Yes	No	No	No

As nouns, aluminium oxide and alumina are synonyms defined as:

aluminium oxide and alumina: any of various forms of aluminum oxide occurring naturally as corundum

Other synonyms of aluminium oxide include aluminum oxide.

aluminium oxide (noun)	alumina (noun)
any of various forms of aluminum oxide occurring naturally as corundum	any of various forms of aluminum oxide occurring naturally as corundum