The best replacement for isolation is quarantine.

The best alternatives to isolation are rated as following:
★★★★★  quarantine
★★★★  compound
★★★  intimacy
★★★  intervention
★★  compound exercises
★★  insulation
★★  alienation
★  solitude
★  full body workouts
★  transmission based precautions
★  full body
★  loneliness
  extraction
  noise cancelling
  involvement
  in context
  engagement
  full body workout
  context
  compound movements
  noise cancellation
  geographic isolation
  noise reduction
  grammar in context
  compound weight training
  generativity
  compound exercise
  reverse isolation
  teaching vocabulary in context

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Speaking about isolation, one probably shouldn't forget about stronglifts.

Other search terms related to isolation and their ratings are:
★★★★★ stronglifts
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Google Trends

Scale is based on the average worldwide traffic of isolation in all years. Click on graph for more.
isolation
quarantine
compound