polypropene vs polypropylene

polypropene and polypropylene both are nouns.

Word	Noun	Adjective	Verb	Adverb
polypropene	Yes	No	No	No
polypropylene	Yes	No	No	No

As nouns, polypropene and polypropylene are synonyms defined as:

polypropene and polypropylene: a polymer of propylene used as a thermoplastic molding material

polypropene (noun)	polypropylene (noun)
a polymer of propylene used as a thermoplastic molding material	a polymer of propylene used as a thermoplastic molding material