The best replacement for spasms is cramps.

The best alternatives to spasms are rated as following:
★★★★★  cramps
★★★  twitches
★★★  twitching
★★  heart palpitations
★★  tremors
★★  baby moving
★★  seizures
★  startle reflex
★  heart problems
★  muscle cramps
★  baby kicking
★  kidney pain
★  convulsions
★  fetal movement
★  spasticity
  muscle twitches
  charlie horses
  moro reflex

Your alternative for spasms is not listed? Suggest!
Speaking about spasms, one probably shouldn't forget about spinal cord injury.

Other search terms related to spasms and their ratings are:
★★★★★ spinal cord injury
★★★ hypsarrhythmia
★★★ sciatica
You have in mind a companion for spasms and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of spasms in all years. Click on graph for more.
spasms
cramps
twitches