We don't have synonyms for ethenes yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are ethene, ethynes and athenes.
(n) :
(organic chemistry, IUPAC name) The organic chemical compound ethylene. The simplest alkene, a colorless gaseous (at room temperature and pressure) hydrocarbon with the chemical formula C₂H₄
(n) :
(organic chemistry) Any alkene derived from ethylene
(n) :
(organic chemistry, IUPAC name) The organic chemical compound ethylene. The simplest alkene, a colorless gaseous (at room temperature and pressure) hydrocarbon with the chemical formula C₂H₄
(n) :
(organic chemistry) Any alkene derived from ethylene