The best replacement for glitch is bug.

The best alternatives to glitch are rated as following:
★★★★★  bug
★★★  effectrix
★★  exploit
★★  chibi
★  non stop
★  hitch
  not to glitch
  nonstop
  great chasm glitch

Your alternative for glitch is not listed? Suggest!
Speaking about glitch, one probably shouldn't forget about blood on the ice.

Other search terms related to glitch and their ratings are:
★★★★★ blood on the ice
★★★ warthog
You have in mind a companion for glitch and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of glitch in all years. Click on graph for more.
glitch
bug
effectrix