isinglass vs lepidolite

isinglass and lepidolite both are nouns.

Word	Noun	Adjective	Verb	Adverb
isinglass	Yes	No	No	No
lepidolite	Yes	No	No	No

As nouns, lepidolite is a hyponym of isinglass; that is, lepidolite is a word with a more specific, narrower meaning than isinglass:

isinglass: any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves; used as dielectrics because of their resistance to electricity
lepidolite: a mineral of the mica group; an important source of lithium

Other hyponyms of isinglass include biotite, muscovite, paragonite, phlogopite, zinnwaldite.

isinglass (noun)	lepidolite (noun)
any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves; used as dielectrics because of their resistance to electricity	a mineral of the mica group; an important source of lithium