The best replacement for killing is letting die.

The best alternatives to killing are rated as following:
★★★★★  letting die
★★★  letting die euthanasia
★★  allowing to die
★★  murder
★★  euthanasia
★★  caring
★  murdering
★  making a living
  twin peaks
  capital punishment
  not killing
  mercy death
  assassination
  letting
  homicide
  concentration dependent killing
  serial killing

Your alternative for killing is not listed? Suggest!
Speaking about killing, one probably shouldn't forget about bounty skyrim.

Other search terms related to killing and their ratings are:
★★★★★ bounty skyrim
★★ poison
★ getting caught skyrim
You have in mind a companion for killing and it is not yet here? Propose!



Google Trends

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killing
letting die
letting die euthanasia