The best replacement for clonus is myoclonus.

The best alternatives to clonus are rated as following:
★★★★★  myoclonus
★★★  babinski
★★  spasticity
★  nystagmus
★  hyperreflexia
★  fasciculations
★  spasm
  clonus
  hoffman's

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

Other search terms related to clonus and their ratings are:
★★★★★ hyperreflexia
★ spasticity
hyper reflexia
You have in mind a companion for clonus and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of clonus in all years. Click on graph for more.
clonus
myoclonus
babinski