Pestc is a general term that refers to any pesticide or chemical used to control pests. There are many synonyms for this term that can be used depending on the type of pest that is being controlled. For example, if you are trying to control ants, you may use the term "ant killer" or "ant spray." If you are trying to control mosquitoes, you may use "mosquito repellant" or "mosquito spray." Other common synonyms for pestc include insecticide, herbicide, fungicide, and rodenticide. It's important to choose the right pestc for the job to ensure that it is effective and safe for both humans and the environment.