isinglass vs muscovite

isinglass and muscovite both are nouns.

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

As nouns, muscovite is a hyponym of isinglass; that is, muscovite 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
muscovite: a colorless or pale brown mica with potassium

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

isinglass (noun)	muscovite (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 colorless or pale brown mica with potassium