periclase vs magnesium oxide

periclase and magnesium oxide both are nouns.

Word	Noun	Adjective	Verb	Adverb
periclase	Yes	No	No	No
magnesium oxide	Yes	No	No	No

As nouns, periclase and magnesium oxide are synonyms defined as:

periclase and magnesium oxide: a white solid mineral that occurs naturally as periclase; a source of magnesium

Other synonyms of periclase include magnesia.

periclase (noun)	magnesium oxide (noun)
a white solid mineral that occurs naturally as periclase; a source of magnesium	a white solid mineral that occurs naturally as periclase; a source of magnesium