zirconium dioxide vs zirconia

zirconium dioxide and zirconia both are nouns.

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

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

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

Other synonyms of zirconium dioxide include zirconium oxide.

zirconium dioxide (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