Hooke's Law is a principle of physics that relates the extension of a spring or other elastic object to the force applied to it. Synonyms for Hooke's Law include the elasticity principle, the spring law, and the spring constant principle. These terms all describe the same basic concept of the relationship between force and deformation in elastic materials. Other related concepts include stress and strain, which describe the internal forces and deformations that occur in solid materials under external loads. Understanding these principles is important for designing and analyzing structures and materials in engineering and other fields.