The best replacement for smoothie is juice.

The best alternatives to smoothie are rated as following:
★★★★★  juice
★★★★★  milkshake
★★★★★  shake
★★  juicing
★★  whole fruit
★★  juicer
★★  blender
★★  juice cleanse
★★  frappe
★  smoothy
★  salad
★  juice fast
★  green juice
★  slush
★  protein shake
  smoothie king
  juice detox
  juice better
  pacer
  shake difference
  surly pacer
  protein shakes
  shakeology

Your alternative for smoothie is not listed? Suggest!
Speaking about smoothie, one probably shouldn't forget about frozen fruit.

Other search terms related to smoothie and their ratings are:
★★★★★ frozen fruit
You have in mind a companion for smoothie and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of smoothie in all years. Click on graph for more.
smoothie
juice
milkshake