insulation vs foam glass

insulation and foam glass both are nouns.

Word	Noun	Adjective	Verb	Adverb
insulation	Yes	No	No	No
foam glass	Yes	No	No	No

insulation (noun)	foam glass (noun)
the act of protecting something by surrounding it with material that reduces or prevents the transmission of sound or heat or electricity	Cellular glass, also called foam glass or expanded glass is a light, opaque, cellular glass made by adding powdered carbon to crushed glass and firing the mixture.
the state of being isolated or detached
insulating material that reduces or prevents the transmission of heat or sound or electricity