zirconium vs zirconium silicate

zirconium and zirconium silicate both are nouns.

Word	Noun	Adjective	Verb	Adverb
zirconium	Yes	No	No	No
zirconium silicate	Yes	No	No	No

zirconium (noun)	zirconium silicate (noun)
a lustrous grey strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zircon	a common mineral occurring in small crystals; chief source of zirconium; used as a refractory when opaque and as a gem when transparent