The best replacement for ethene is ethylene.

The best alternatives to ethene are rated as following:
★★★★★  ethylene
★★★★  ethane
  ethane more reactive
  ethyne

Your alternative for ethene is not listed? Suggest!
Speaking about ethene, one probably shouldn't forget about bromine.

Other search terms related to ethene and their ratings are:
★★★★★ bromine
★★★ bromine water
★★ aqueous bromine
You have in mind a companion for ethene and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ethene in all years. Click on graph for more.
ethene
ethylene
ethane