Repellents are substances that are designed to repel or deter potential pests, insects, or animals from approaching or invading a particular area. Some common synonyms for the word repellents include deterrents, inhibitors, and dissuaders. These substances are often used to prevent damage caused by pests or animals, such as plants, crops, or homes. Other synonyms for repellents include aversive agents, defences, and barriers. These words are often used in scientific research and in the agricultural or pest control industries. The specific type of repellent used will depend on the target pest or animal, as well as the environment in which it is being used.