zirconium dioxide vs zirconium oxide

zirconium dioxide and zirconium oxide both are nouns.

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

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

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

Other synonyms of zirconium dioxide include zirconia.

zirconium dioxide (noun)	zirconium oxide (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