aluminum oxide vs alumina

aluminum oxide and alumina both are nouns.

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

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

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

Other synonyms of aluminum oxide include aluminium oxide.

aluminum 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