The best replacement for cushion is radiant.

The best alternatives to cushion are rated as following:
★★★★★  radiant
★★★  round diamond
★★★  asscher
★★★  round cut
★★  radiant cut
★★  princess
★★  pillow
★★  stability running shoes
★★  radiant diamond
★  asscher cut
★  princess diamond
★  radiant cut diamond
★  pneumatic tires
  oval diamond
  old mine cut
  emerald cut
  cushette
  round moissanite
  asscher cut diamond
  radiant cut diamonds
  princess cut diamonds
  radiant diamonds
  round brilliant
  ascher
  stability running shoe
  seat
  box cushion
  t cushion

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

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



Google Trends

Scale is based on the average worldwide traffic of cushion in all years. Click on graph for more.
cushion
radiant
round diamond