Instability vs. Unstability

Instabilitynoun

(uncountable) The quality of being unstable.

Instabilitynoun

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

Instabilitynoun

The quality or condition of being unstable; lack of stability, firmness, or steadiness; liability to give way or to fail; insecurity; precariousness; as, the instability of a building.

Instabilitynoun

Lack of determination of fixedness; inconstancy; fickleness; mutability; changeableness; as, instability of character, temper, custom, etc.

Instabilitynoun

an unstable order

Instabilitynoun

unreliability attributable to being unstable

Instabilitynoun

a state of disequilibrium (as may occur in cases of inner ear disease)

Instabilitynoun

the quality or attribute of being unstable and irresolute

Instability

In numerous fields of study, the component of instability within a system is generally characterized by some of the outputs or internal states growing without bounds. Not all systems that are not stable are unstable; systems can also be marginally stable or exhibit limit cycle behavior.

Unstabilitynoun

(rare) Instability.