nonconductor vs insulator

nonconductor and insulator both are nouns.

Word	Noun	Adjective	Verb	Adverb
nonconductor	Yes	No	No	No
insulator	Yes	No	No	No

As nouns, nonconductor and insulator are synonyms defined as:

nonconductor and insulator: a material such as glass or porcelain with negligible electrical or thermal conductivity

Other synonyms of nonconductor include dielectric.

nonconductor (noun)	insulator (noun)
a material such as glass or porcelain with negligible electrical or thermal conductivity	a material such as glass or porcelain with negligible electrical or thermal conductivity