The best replacement for matter is energy.

The best alternatives to matter are rated as following:
★★★★★  energy
★★★★  mass
★★★  antimatter
★★  manner
★  matters
★  non matter
★  white matter
★  mater
★  gray matter
★  not matter
★  madder
★  dark matter
★  matter
★  dark energy
★  mind
  substance
  in this matter
  grey matter
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  on this matter
  clio
  no matter
  grey matter in brain
  chemical properties of matter
  low quality matter
  timely manner
  white matter brain
  space
  inorganic matter
  gray matter in brain
  issue
  personal jurisdiction

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

Other search terms related to matter and their ratings are:
★★★★★ mass
★★★★ definite shape and volume
★★ form
★★ electrons
★ space
★ energy
★ slow moving particles
You have in mind a companion for matter and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of matter in all years. Click on graph for more.
matter
energy
mass