The best replacement for ataxia is apraxia.

The best alternatives to ataxia are rated as following:
★★★★★  apraxia
★★★★  dysmetria
★  athetosis
★  dyskinesia
★  chorea
★  truncal ataxia
  dystaxia
  dyspraxia
  sensory ataxia
  dysarthria
  antalgia
  dystonia
  paresis
  motor ataxia
  akinesia
  gait ataxia
  myoclonus
  cerebellar ataxia
  ataxia

Your alternative for ataxia is not listed? Suggest!
Speaking about ataxia, one probably shouldn't forget about oculomotor apraxia.

Other search terms related to ataxia and their ratings are:
★★★★★ oculomotor apraxia
★★★★ vitamin e deficiency
★★ gait
★★ neuropathy
★★ peripheral neuropathy
★★ nystagmus
★★ myoclonus
★ axonal neuropathy
★ ocular motor apraxia
cerebellar atrophy
msa
retinitis pigmentosa
You have in mind a companion for ataxia and it is not yet here? Propose!



Google Trends

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ataxia
apraxia
dysmetria