- Solids: Solids have a fixed shape and volume and do not flow easily. Examples include wood, metal, and ice.

- Gels: Gels are semi-solid materials that have a jelly-like consistency. They can flow slowly but do not take the shape of their container. Examples include gelatin, pudding, and toothpaste.

- Greases: Greases are thick, viscous substances that are used as lubricants. They do not flow easily and have a high resistance to shear.

- Pastes: Pastes are thick, semi-solid mixtures of solids and liquids. They can flow slowly but do not take the shape of their container. Examples include toothpaste, peanut butter, and paint.

- Powders: Powders are finely divided solid particles that do not flow easily. Examples include flour, sugar, and sand.