insulant vs building material

insulant and building material both are nouns.

Word	Noun	Adjective	Verb	Adverb
insulant	Yes	No	No	No
building material	Yes	No	No	No

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

insulant: insulating material that reduces or prevents the transmission of heat or sound or electricity
building material: material used for constructing buildings

insulant (noun)	building material (noun)
insulating material that reduces or prevents the transmission of heat or sound or electricity	material used for constructing buildings