chert vs silicon dioxide

chert and silicon dioxide both are nouns.

Word	Noun	Adjective	Verb	Adverb
chert	Yes	No	No	No
silicon dioxide	Yes	No	No	No

As nouns, silicon dioxide is a hypernym of chert; that is, silicon dioxide is a word with a broader meaning than chert:

chert: variety of silica containing microcrystalline quartz
silicon dioxide: a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite

Other hypernyms of chert include silica, silicon oxide.

chert (noun)	silicon dioxide (noun)
variety of silica containing microcrystalline quartz	a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite