Protein dynamics refers to the various changes in protein structures, movements, and interactions that occur over time. There are several synonyms for this term that are commonly used, such as protein motion, protein flexibility, and protein conformational changes. Protein motion refers to the physical movements of protein molecules, such as rotations, translations, and vibrations. Protein flexibility refers to the ability of proteins to change their shape or conformation in response to external stimuli or environmental changes. Protein conformational changes refer to the changes in protein structures that occur when proteins bind to other molecules, such as enzymes or other proteins. These synonyms are often used interchangeably to describe the complex behavior of proteins in biological systems.