The best replacement for friction is gravity.

The best alternatives to friction are rated as following:
★★★★★  gravity
★★★★★  shear
★★★★★  traction
★★★★★  kinetic friction
★★★★  surface area
★★★  normal force
★★★  index shifting
★★  drag
★★  air resistance
★  rolling friction
★  force
★  shearing
★  static friction
★  inertia
★  contact area
★  surface finish
★  applied force
★  dynamic friction
★  sliding friction
  non friction
  static electricity
  surface roughness
  drag factor
  screw back earrings

Your alternative for friction is not listed? Suggest!
Speaking about friction, one probably shouldn't forget about roller coasters.

Other search terms related to friction and their ratings are:
★★★★★ roller coasters
★★★★ acceleration
★★★★ gravity
★★★ slipping
★★★ pulleys
★★ wheels
★★ velocity
★ fiction
★ constant velocity
You have in mind a companion for friction and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of friction in all years. Click on graph for more.
friction
gravity
shear