Pollution is a major problem worldwide, and the term "pollutant" refers to any substance that causes environmental pollution. There are numerous synonyms for this word, which include contaminant, toxin, impurity, harmful substance, and pollutant substance. Other synonyms for pollutant include waste, litter, refuse, effluent, emissions, and residue. These terms describe various forms of pollution, including air pollution, water pollution, soil pollution, noise pollution, and light pollution. Understanding these synonyms helps in making environmental issues more concise and specific. By using these related terms, researchers, policymakers, and environmentalists can be more targeted in their efforts to address pollution and protect the environment.