Biomonitoring is the process of tracking and measuring levels of environmental pollutants and toxins in biological samples such as blood, urine, and hair to assess human exposure. There are several synonyms for biomonitoring, including bio-assaying, biomarking, and environmental monitoring. Other terms include toxicological monitoring, bioindication, and ecotoxicology. These terms are often used interchangeably with biomonitoring and represent different aspects of monitoring environmental pollutants. For instance, ecotoxicology is concerned with the impact of environmental contaminants on ecosystems and non-human organisms. Meanwhile, biomarking refers to the use of molecular or chemical markers to identify pollutant exposure. Together, these synonyms highlight the importance of tracking the harmful effects of pollution on our environment and health.