"volatility" in the noun sense
the property of changing readily from a solid or liquid to a vapor
2. volatility, unpredictability
the trait of being unpredictably irresolute
"the volatility of the market drove many investors away"
3. excitability, excitableness, volatility
being easily excited
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License