The best replacement for plea is plead.

The best alternatives to plea are rated as following:
★★★★★  plead
★★★  trial
★★  conviction
★★  no contest
★  no contest plea
★  guilty plea
★  go to trial
★  nolo contendere
  guilty
  not to plea

Your alternative for plea is not listed? Suggest!
Speaking about plea, one probably shouldn't forget about no contest.

Other search terms related to plea and their ratings are:
★★★★★ no contest
You have in mind a companion for plea and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of plea in all years. Click on graph for more.
plea
plead
trial