Smogs are harmful air pollutants that negatively impact air quality and human health. As the term smog is quite specific, there are not many direct synonyms for this word. Different types of smog, however, can be referred to using more specific terms. For example, photochemical smog is caused by the reaction of sunlight with pollutants, while industrial smog comes from manufacturing processes. Other potential synonyms for smog could include terms like pollution, haze, or air contamination. However, these terms do not necessarily capture the full extent of the harmful effects of smog and should be used with care in scientific or technical writing.