ethene vs ethylene

ethene and ethylene both are nouns.

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

As nouns, ethene and ethylene are synonyms defined as:

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

ethene (noun)	ethylene (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