The best replacement for guard is reserve.

The best alternatives to guard are rated as following:
★★★★★  reserve
★★★★  tackle
★★★  army reserve
★★  reserves
★★  navy
★★  active duty
★★  lifelock
★  guard
★  army
★  grunt
★  air force
★  reserve air force
★  air force reserve
★  gaurd
★  point guard
★  tau
★  army national guard
★  guard up
★  reserve which is better
★  reserve pay
★  shooting guard
★  watchr
  watchman
  keel shield
  autotest
  travelex
  kryptonite
  thieves
  security officer
  gutter helmet
  resize
  air force reserves
  tau tactics
  gutter helmut
  equifax
  off-guard
  mederma
  army reserves
  sentry
  gutter guard
  magic armor
  cheerleading
  zoanthropes
  nikwax
  reserve army
  color guard
  wrap

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

Other search terms related to guard and their ratings are:
★★★★★ spork
★★★★ zeus
★★★★ winch mount
★★★★ portfast
★★ deployment
★ skid plate
★ grinder
getting deployed
You have in mind a companion for guard and it is not yet here? Propose!



Google Trends

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guard
reserve
tackle