Repellants can be defined as substances that are used to keep something away. Insect repellants, for example, are chemicals that are used to keep insects away from the skin or clothing. There are several synonyms that can be used for repellants, depending on the context of the use. Some of the synonyms for repellants include deterrents, blockers, inhibitors, barriers, and discouragers. Each of these synonyms conveys the idea that something is being used to prevent or discourage something else from happening or coming into contact with a person or object. In conclusion, there are many words that can be used as synonyms for the term repellants.