polyurethane foam vs polyfoam

polyurethane foam and polyfoam both are nouns.

Word	Noun	Adjective	Verb	Adverb
polyurethane foam	Yes	No	No	No
polyfoam	Yes	No	No	No

As nouns, polyurethane foam and polyfoam are synonyms defined as:

polyurethane foam and polyfoam: a foam made by adding water to polyurethane plastics

polyurethane foam (noun)	polyfoam (noun)
a foam made by adding water to polyurethane plastics	a foam made by adding water to polyurethane plastics