corkboard vs insulant

corkboard and insulant both are nouns.

Word	Noun	Adjective	Verb	Adverb
corkboard	Yes	No	No	No
insulant	Yes	No	No	No

As nouns, insulant is a hypernym of corkboard; that is, insulant is a word with a broader meaning than corkboard:

corkboard: a heat-insulating building material consisting of cork granules that are made into sheets by compressing and baking
insulant: insulating material that reduces or prevents the transmission of heat or sound or electricity

Other hypernyms of corkboard include insulation.

corkboard (noun)	insulant (noun)
a heat-insulating building material consisting of cork granules that are made into sheets by compressing and baking	insulating material that reduces or prevents the transmission of heat or sound or electricity