ethylene vs ethene

ethylene and ethene both are nouns.

Word	Noun	Adjective	Verb	Adverb
ethylene	Yes	No	No	No
ethene	Yes	No	No	No

As nouns, ethylene and ethene are synonyms defined as:

ethylene and ethene: a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic

ethylene (noun)	ethene (noun)
a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic	a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic