The best replacement for trooper is trouper.

The best alternatives to trooper are rated as following:
★★★★★  trouper
★★★  bounty hunter
★★★  rodeo
★★  smuggler
★★  jedi knight
★  smuggler story
★  pajero
★  montero
★  imperial agent
★  stormtrooper
★  police officer
★  bounty hunter swtor
★  paramedic
★  consular
★  sheriff
★  nemesis
★  emt
★  police
★  commando
  city police
  sith warrior
  raider
  ambulance
  terrano
  blunt posse
  highway patrol
  clone commando
  clone trooper
  bh
  trooper
  storm trooper
  battle droid
  undercover cop
  medic

Your alternative for trooper is not listed? Suggest!
Speaking about trooper, one probably shouldn't forget about speeder bike.

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



Google Trends

Scale is based on the average worldwide traffic of trooper in all years. Click on graph for more.
trooper
trouper
bounty hunter