The best replacement for hibernation is sleep.

The best alternatives to hibernation are rated as following:
★★★★★  sleep
★★★★  standby
★★★  torpor
★★★  sleep mode
★★★  shutdown
★★  estivation
★★  migration
★  brumation
★  winter sleep
★  dormancy
★  deep sleep
★  diapause
  standby mode
  hibernation
  shut down
  stand by
  daily torpor
  hybrid sleep
  suspend
  topor
  stunning

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Google Trends

Scale is based on the average worldwide traffic of hibernation in all years. Click on graph for more.
hibernation
sleep
standby