<unk>  refers to an impaired sense or absence of balance or equilibrioception that primarily occurs during standing or walking and usually without any cephalic sensations like headache, nausea and vomiting.  It is one among the causes of dizziness and it is typically a more complex category with more continuous symptoms than the other causes of dizziness like presyncope and vertigo.
Disequilibrium
Character displacement
Dissociation 
Resonance
Derealization
Normalisation 
Deceleration
Anise