insulation vs insulant

insulation and insulant both are nouns.

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

As nouns, insulation and insulant are synonyms defined as:

insulation and insulant: insulating material that reduces or prevents the transmission of heat or sound or electricity

insulation (noun)	insulant (noun)
the act of protecting something by surrounding it with material that reduces or prevents the transmission of sound or heat or electricity	insulating material that reduces or prevents the transmission of heat or sound or electricity
the state of being isolated or detached
insulating material that reduces or prevents the transmission of heat or sound or electricity