Superpixels are small regions of pixels that group together to form larger areas of similar color or texture in an image. Synonyms for the word "superpixel" include: 1. Over-segmentation: This refers to the process of dividing an image into smaller, more manageable segments to reduce complexity. 2. Categorical pixel: An alternative term to superpixel that emphasizes the categorization of pixels into segments. 3. Region-based segmentation: A similar term to over-segmentation that highlights the use of regions to group pixels. 4. Patch: A small, localized area of an image that may be considered a superpixel. 5. Image subdivision: Another term that highlights the division of images into smaller, more manageable parts. Overall, these synonyms all refer to different ways of segmenting or dividing an image to make it easier to process and analyze.