The best replacement for probable cause is reasonable suspicion.

The best alternatives to probable cause are rated as following:
★★★★★  reasonable suspicion
★★  reasonable doubt
★★  reasonable cause
★  contributing cause
★  suspicion
★  warrant
  reasonable belief
  reasonable suspicion examples
  beyond reasonable doubt
  beyond a reasonable doubt
  articulable suspicion
  possible cause
  exigent circumstances
  reasonable suspicion is
  reasonable suspension
  reasonable

Your alternative for probable cause is not listed? Suggest!
Speaking about probable cause, one probably shouldn't forget about warrant.

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



Google Trends

Scale is based on the average worldwide traffic of probable cause in all years. Click on graph for more.
probable cause
reasonable suspicion
reasonable doubt