instability in WordNet English dictionary

1. a lack of balance or state of disequilibrium
   "a hormonal imbalance"
   imbalance  instability  unbalance 
   
2. the quality or attribute of being unstable and irresolute
   instability  unstableness 
   
3. unreliability attributable to being unstable
   instability 
   
4. an unstable order
   instability