zirconium oxide vs zirconia

zirconium oxide and zirconia both are nouns.

Word	Noun	Adjective	Verb	Adverb
zirconium oxide	Yes	No	No	No
zirconia	Yes	No	No	No

As nouns, zirconium oxide and zirconia are synonyms defined as:

zirconium oxide and zirconia: a white crystalline oxide; used in refractories and in insulation and abrasives and enamels and glazes

Other synonyms of zirconium oxide include zirconium dioxide.

zirconium oxide (noun)	zirconia (noun)
a white crystalline oxide; used in refractories and in insulation and abrasives and enamels and glazes	a white crystalline oxide; used in refractories and in insulation and abrasives and enamels and glazes