Subdiffusion refers to the slower than expected movement of particles in a medium. Some synonyms for this word include slow diffusion, hindered diffusion, anomalous diffusion, or restricted diffusion. In scientific research, subdiffusion is used to explain and study various physical phenomena that involve the intricate movements of particles in a given medium. It is a commonly observed behaviour in complex systems such as soft matters and biological tissues, where the movement of particles is restricted by various factors. Synonyms for subdiffusion can be useful for describing the movement of these particles and understanding the behaviour of materials in different conditions.