aluminum oxide vs corundum

aluminum oxide and corundum both are nouns.

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

As nouns, corundum is a hypernym of aluminum oxide; that is, corundum is a word with a broader meaning than aluminum oxide:

aluminum oxide: any of various forms of aluminum oxide occurring naturally as corundum
corundum: very hard mineral used as an abrasive

Other hypernyms of aluminum oxide include corundom.

aluminum oxide (noun)	corundum (noun)
any of various forms of aluminum oxide occurring naturally as corundum	very hard mineral used as an abrasive