Diffuse reflection refers to the spreading out of light in different directions after it strikes a surface. There are various synonyms for the term, including diffuse scattering, random reflection, and translational diffusion. Diffuse scattering refers to the way in which light waves are scattered in all directions, making it difficult for a clear image to be formed. Random reflection is similar, and involves light being dispersed in a chaotic and haphazard manner upon striking a surface. Translational diffusion, on the other hand, pertains to the movement of particles of a substance through space, each of which may disperse light in different directions. Overall, these synonyms highlight the complex yet fascinating ways in which light behaves and interacts with the objects around us.