Azotous is a scientific term that refers to an element, nitrogen. Some synonyms for azotous include nitrogenous, nitrous, and nitric. Nitrogenous refers to compounds containing nitrogen, while nitrous and nitric pertain to different nitrogen oxides. Nitrous oxide, N2O, is commonly known as laughing gas and is used as an anesthetic and recreational drug. Nitric oxide, NO, is a gas that plays a role in the regulation of blood pressure and immune response. These synonyms are often used in scientific contexts, such as in chemistry and biology, but may be less familiar to the general public.