The best replacement for anaerobic is aerobic.

The best alternatives to anaerobic are rated as following:
★★★★★  aerobic
★★★★  aerobic respiration
★★★  aerobic exercise
★★★  anoxic
★★  aerobic bacteria
★★  aerobic metabolism
★  aerobic first
★  aerobic glycolysis
★  aerobic more efficient
★  aerobic compost
★  fermentation
★  aerobic produces more atp
  aerobic running
  aerobic culture
  aerobic definition
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  aerobic composting
  aerobic crossfit
  aerobic workout
  aerobic weight loss
  aerobic swimming
  aerobic cultures
  aerobic cells
  anaerobic
  aerobic septic system
  aerobic cellular respiration
  aerobic atp production
  aerobic treatment
  aerobic atp
  rtv
  aerobics
  aerobic endurance

Your alternative for anaerobic is not listed? Suggest!
Speaking about anaerobic, one probably shouldn't forget about aerobic respiration.

Other search terms related to anaerobic and their ratings are:
★★★★★ aerobic respiration
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anaerobic
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