The best replacement for lunge is squat.

The best alternatives to lunge are rated as following:
★★★★★  squat
★★★  split squat
★★  step up
★★  reverse lunge
★  walking lunge
★  longe
★  back lunge
★  bulgarian split squat
★  forward lunge
★  backward lunge
  stepup
  regular lunge
  bulgarian squat
  not to lunge
  lurch
  wide stance squat

Your alternative for lunge is not listed? Suggest!
Speaking about lunge, one probably shouldn't forget about bicep curl.

Other search terms related to lunge and their ratings are:
★★★★★ bicep curl
★★★ front kick
★★ lateral raise
★ hammer curl
You have in mind a companion for lunge and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of lunge in all years. Click on graph for more.
lunge
squat
split squat