The best replacement for momentum is inertia.

The best alternatives to momentum are rated as following:
★★★★★  inertia
★★★★  kinetic energy
★★★  impulse
★★★  energy
★★  velocity
★  force
★  revolution
★  m100
★  p7
★  points plus
★  amperior
★  celerity
  momentum on ear
  hd 598
  b&w p5
  ath m50
  torque
  hd650
  ke
  sennheiser amperior
  mdr-1r
  conservation of energy
  angular momentum
  volatility
  trend
  electron spin
  abilities
  change in momentum
  hd25

Your alternative for momentum is not listed? Suggest!
Speaking about momentum, one probably shouldn't forget about energy.

Other search terms related to momentum and their ratings are:
★★★★★ energy
★★★★ kinetic energy
★ having energy
★ rotation
changing its kinetic energy
You have in mind a companion for momentum and it is not yet here? Propose!



Google Trends

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momentum
inertia
kinetic energy