The best replacement for martyr is victim.

The best alternatives to martyr are rated as following:
★★★★★  victim
★★★  madman
★★  saint
★★  terrorist
★  murderer
★  seal of command

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

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



Google Trends

Scale is based on the average worldwide traffic of martyr in all years. Click on graph for more.
martyr
victim
madman