The best replacement for kill is disable mr house.

The best alternatives to kill are rated as following:
★★★★★  disable mr house
★★★★  murder
★★★★  spare slate
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★★  kill 9
★★  die
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★  megatron
★  spare twinblade
★  to kill a mockingbird
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★  help alira
★  slay
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★  fill
★  mame
★  creek
★  fast kill
  kill shelters
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Speaking about kill, one probably shouldn't forget about bounty skyrim.

Other search terms related to kill and their ratings are:
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Google Trends

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kill
disable mr house
murder