Haptoglobin is a glycoprotein that works as a binding agent for free hemoglobin, preventing kidney damage and removing it from the circulation. Some possible synonyms for haptoglobin include Hp, alpha-2-HS-glycoprotein, and zonulin. It is essential to note that these names refer to the same protein, and there might be regional differences in their usage. Researchers and healthcare professionals require various synonyms to describe the same protein, as it helps in avoiding confusion between different studies that might use different nomenclature. Hence, having an extensive list of synonyms that are acceptable helps in promoting a standardized communication system in scientific research.