Insecurity vs Instability - What's the difference?

As nouns the difference between insecurity and instability

is that insecurity is a lack of security, uncertainty while instability is the quality of being unstable.

(insecurities)

A lack of security, uncertainty

The state of being subject to danger; vulnerability

* insecureness

* security

(wikipedia instability)

(uncountable) The quality of being unstable.

(physics, countable) A state that is not in equilibrium, or in which a small change has a large irreversible effect.

* volatility