vitreous silica vs quartz

vitreous silica and quartz both are nouns.

Word	Noun	Adjective	Verb	Adverb
vitreous silica	Yes	No	No	No
quartz	Yes	No	No	No

As nouns, vitreous silica and quartz are synonyms defined as:

Other synonyms of vitreous silica include crystal, lechatelierite, quartz glass.

vitreous silica (noun)	quartz (noun)
colorless glass made of almost pure silica	a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities
	colorless glass made of almost pure silica