Supersymmetry refers to the theoretical concept of a symmetry that relates particles with different spins. However, there are several synonyms that can be applied to this concept. These include SUSY, superpartnership, supergravity, and superstring theory. SUSY represents the abbreviation for supersymmetry and is commonly used in scientific literature. Superpartnership, on the other hand, emphasizes the idea of symmetry between particles and anti-particles. Supergravity refers to a higher-dimensional extension of general relativity, which attempts to unify the different forces of nature. Finally, superstring theory postulates that particles are not point-like objects but rather tiny, one-dimensional strings that vibrate at different frequencies. All these terms are commonly used in contemporary physics discussions and research.