The best replacement for silencer is suppressor.

The best alternatives to silencer are rated as following:
★★★★★  suppressor
★★  muffler
★★  od
★★  zaito
★  muzzle brake
★  outworld devourer
★  cold blooded
★  invoker
★  resonator
★  moderator
★  puck
  frooztreitted hoemmizyd
  juan tamad
  obsidian destroyer
  heartbeat

Your alternative for silencer is not listed? Suggest!
Speaking about silencer, one probably shouldn't forget about subsonic ammo.

Other search terms related to silencer and their ratings are:
★★★★★ subsonic ammo
★★ revolver
★★ stopping power
★★ cold blooded
You have in mind a companion for silencer and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of silencer in all years. Click on graph for more.
silencer
suppressor
muffler