alumina vs aluminum oxide

alumina and aluminum oxide both are nouns.

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

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

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

Other synonyms of alumina include aluminium oxide.

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