Elastic – returns after stretch
Plastic – deforms and stays changed
Viscoelastic – time-dependent response (both elastic + fluid)}
Compliant – yields easily
Stiff – resists deformation
Rigid – almost no movement
Tensile – handles pulling forces
Compressible – yields under pressure
Resilient – absorbs and releases energy
Liquid – flows downward, follows gravity
Fluid – flows in any direction, adapts and moves freely (up like flame, down, across)