alumina vs aluminium oxide

alumina and aluminium oxide both are nouns.

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

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

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

Other synonyms of alumina include aluminum oxide.

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