mineral wool vs nonconductor

mineral wool and nonconductor both are nouns.

Word	Noun	Adjective	Verb	Adverb
mineral wool	Yes	No	No	No
nonconductor	Yes	No	No	No

As nouns, nonconductor is a hypernym of mineral wool; that is, nonconductor is a word with a broader meaning than mineral wool:

mineral wool: a light fibrous material used as an insulator
nonconductor: a material such as glass or porcelain with negligible electrical or thermal conductivity

Other hypernyms of mineral wool include dielectric, insulator.

mineral wool (noun)	nonconductor (noun)
a light fibrous material used as an insulator	a material such as glass or porcelain with negligible electrical or thermal conductivity