4. Spinodal Phase Separation (Spinodal decomposition)

This is analogous to LW dewetting.
Phase separation occurs by two mechanisms-

1. Nucleation & Growth ( An energy barrier has to be overcome)
2.  Spinodal Mechanism (There is no energy barrier to overcome)

5. Turbulence

Turbulence can be viewed as instability in the laminar flow profile. This means that the basic solution of the Navier-Stokes Equation is unstable.
There are also other instabilities such as  Helmholtz instability, a continuous stirred tank reactor (CSTR) being operated non-isothermally, Rayleigh instability, Rayleigh-Taylor instabilities and  a thin film on a non-wettable surface